Baocao ltjava

TRƯỜNG ĐẠI HỌC BÁCH KHOA

KHOA CÔNG NGHỆ THÔNG TIN

BÁO CÁO THỰC HÀNHLẬP TRÌNH JAVA

GVHD: Mai Văn Hà

SVTH: Nguyễn Rim

MSSV:102110156

LỚP: 11T1

NHÓM: 12A

Đà Nẵng,12/2014

Thực hành lập trình java

Buổi 1:

Code bài 1 đến bài 5:

import java.io.*;

public class class_1{

public static void giaiptbn(int a,int b)

{

if (a==0)

{

if (b==0)

{

System.out.println("Phuong trinh vo so nghiem");

}

else

{

System.out.println("Phuong trinh vo nghiem");

}

}

else

{

float tmp;

tmp=-b/(float)a;

System.out.println("Phuong trinh co mot nghiem la :"+tmp);

SVTH: Nguyễn Rim 11T1


}

}

public static void giaibac2(int a,int b,int c)

{

if (a==0)

{

if (b==0)

{

if (c==0) System.out.println("phuong trinh vo so nghiem");

else System.out.println("Phuong trinh vo nghiem");

}

else System.out.println("Phuong trinh co 1 nghiem: "+-1.0*c/b);

}

else

{

double delta,x1,x2;

delta=b*b-4*a*c;

if (delta<0) System.out.println("Phuong trinh vo nghiem");

else

if (delta==0) System.out.println("Phuong trinh co nghiem

kep: "+-1.0*b/(2*a));

else



{

x1=(-b+Math.sqrt(delta))/(2*a);

x2=(-b-Math.sqrt(delta))/(2*a);

System.out.println("Phuong trinh co 2 nghiem.

X1="+x1+", X2="+x2);

}

}

}

//Bai3

public static void trunggian(float a,float b, float c)

{

float max, min;

max=((a>=b)?((a>=c)?a:c):((b>=c)?b:c));

min=((a<=b)?((a<=c)?a:c):((b<=c)?b:c));

if ((a>=min) && (a<=max)) System.out.println("So trung gian la" + a);

else if ((b>=min) && (b<=max)) System.out.println("So trung gian la" +

b);

else System.out.println("So trung gian la" + c);

}

//Bai 4

public static void karaoke(int a,int b)

{

int money;



if (b<=18) money=(b-a)*45000;

else if((a<=18)&&(b>=18)) money = ((b-18)*60000+(18-a)*45000);

else money=(b-a)*60000;

System.out.println("So tien Karaoke phai tra la " + money);

}

//Bai5

public static int ngaythang(int m,int y)

{

int []DayOfMonth={31,28,31,30,31,30,31,31,30,31,30,31};

if (m!=2) return DayOfMonth[m-1];

else

{

int a,b,c;

a=y%400;

b=y%4;

c=y%100;

if ((a==0)||((b==0)&&(c!=0))) return 29;

else return 28;

}

}

public static void main(String [] args)

{

class_1 A=new class();



A.giaiptbn(5,7);

A.giaibac2(2,1,-5);

A.trunggian(1,2,-5);

A.karaoke(19,22);

System.out.println("So ngay trong thang 5 nam 2015 la " +

A.ngaythang(5,2015));

}

}

Demo:



Code bài 6 đến bài 11:

package thuchanh;

public class class_2 {//Bài 6public static void bai6(int n){

if (n<1) System.out.println("Nhap khong dung");else{

float s=0;int i=1;while (i<=n){

s+=(float)1/i;i++;

}System.out.println("Bai 6. Ket qua la: "+s);

}}//Bài 7public static void bai7(int n){

//S=15-1+1/2-1/3!+....+(-1)n 1/n!;float S=15;int i=1,tmp=1;while (i<=n){

tmp=tmp*i*(-1);S+=1.0/tmp;i++;

}

System.out.println("Bai 7. Ket qua la: "+S);

}//Bài 8public static void bai8(int n){

//S=1+1/3!+1/5!+…..+1/(2n-1)!float S=1;int i=2,tmp=1;while (i<=n){

tmp=tmp*(i*2-1)*(i*2-2);S+=1.0/tmp;i++;

}



System.out.println("Bai 8. Ket qua la: "+S);


//= 1*3*5*…..*n(n le)//= 2*4*6*….*n(n chan)int i,T=1;if (n%2>0) // so le{

i=1;}else i=2;while (i<=n){

T*=i;i+=2;

}

System.out.println("Bai 9. Ket qua: "+T);


//(VD : m=234=> S=2+3+4=9, P=2*3*4=24)

int M=0,P=1,i=0,j;int []array = new int[20];while (n!=0){

array[i]=n%10;n=n/10;i++;

}for (j=0;j<i;j++){

M+=array[j];P*=array[j];

}System.out.println("Bai 10.Ket qua Tong = "+M+" , Tich =

"+P);


int tmp,i,check=0;



tmp=n/2;for (i=2;i<tmp;i++)

if (n%i==0){

check = 1;break;

}if (check==0)

System.out.println("Bai11. " + n +" la so nguyen to");else

System.out.println("Bai11. " + n +" khong phai la so nguyen to");

}//Bài 12

public static void main(String []arg){

class_2 A = new class_2();A. bai6 (5) ;A. bai7 (12) ;A. bai8 (10) ;A. bai9 (4) ;A. bai10 (7) ;A. bai11 (13) ;

}}

Demo:



Code bài 12 đến 18:

package thuchanh;

public class class_3 {//Bài 12void bai12(int n){

int tmp;tmp=(int)Math.sqrt(n);tmp*=tmp;System.out.print("Bai12. ");if (tmp==n)

System.out.println(n+" la so chinh phuong");else

System.out.println(n+" khong phai la so chinh phuong");

}//Bài 13void bai13(int n){ System.out.print("Bai13. ");

System.out.printf(n+"");if (n<10){

System.out.printf(" khong phai la so doi xung");}



else{

int []array = new int[20];int i=0;while (n!=0){

array[i]=n%10;n=n/10;i++;

}int tmp1=0,tmp2=0;if (i%2>0) //co so chu so le{

for (int j=i/2;j>=0;j--){

tmp1=tmp1*10+array[j];}for (int j=i/2;j<i;j++){

tmp2=tmp2*10+array[j];}if (tmp1==tmp2) System.out.printf(" la so doi

xung");else System.out.printf(" khong phai la so doi

xung");}else{

for (int j=i/2-1;j>=0;j--){

tmp1=tmp1*10+array[j];}for (int j=i/2;j<i;j++){

tmp2=tmp2*10+array[j];}if (tmp1==tmp2) System.out.printf(" la so doi

xung");else System.out.printf(" khong phai la so doi

xung");}

}}//Bài 14void bai14(int n){ System.out.print("Bai14. ");

if (n>10000) System.out.printf(n+" qua lon");else{

int []array = new int[10000];



int i,j;for (i=1;i<=n;i++) array[i]=0;i=2;while (i<=n){

if (array[i]==0)for (j=2;j<=n/i;j++) array[i*j]=1;

i++;}System.out.println("\n Cac so nguyen to nho hon "+n+"

la:");for (i=2;i<=n;i++)

if (array[i]==0) System.out.printf(i+" ");System.out.println("");

}}//Bài 15void bai15(){

//cac so hona hao nho hon 1000System.out.print("Bai15. ");System.out.printf("Cac so hoan hao nho hon 1000:\n");int tmp,n=2;while (n<=1000){

tmp=1;for (int i=n/2;i>=2;i--)

if (n%i==0) tmp+=i;if (tmp==n) System.out.printf(n+" ");n++;

}System.out.println("");

}//Bài 16void bai16(int n){

//in ra n chu so fibonaci dau tienSystem.out.print("Bai16. ");System.out.printf(n+" chu so Fibonaci dau tien la: 1 2

");int i=3,tmp1=1,tmp2=2,tmp;while (i<=n){

tmp=tmp1+tmp2;tmp1=tmp2;tmp2=tmp;System.out.printf(tmp+" ");i++;

}System.out.println("");



}//Bài 17void bai17(int K){

//kiem tra K co thuoc day fibonaci ko?System.out.print("Bai17. ");int tmp1=1,tmp2=2,tmp;while (tmp2<K){

tmp=tmp1+tmp2;tmp1=tmp2;tmp2=tmp;

}

if (tmp2==K)System.out.printf(K+" thuoc day fibonaci");

else System.out.printf(K+" khong thuoc day fibonaci");

System.out.println("");}//Bài 18void bai18(int x,int y){

//tim uoc chung lon nhat va boi chung nho nhatSystem.out.print("Bai18. ");int ucln,bcnn,tmp;bcnn=x*y;tmp= y%x;while (tmp!=0){

tmp=x%y;x=y;y=tmp;

}ucln=x;System.out.println("Uoc chung lon nhat va boi chung nho

nhat cua "+x+" va "+y+" la :");System.out.printf("UCLN = "+ucln+" ,BCNN = "+ bcnn/ucln);System.out.println("");

}

public static void main(String []arg){

class_3 A = new class_3();A.bai12(5);A.bai13(12321);A.bai14(100);A.bai15();A.bai16(100);A.bai17(125);



A.bai18(12,56);}

}

Demo:

Buổi 2:

Bài 1:

Code:

package thuchanh;

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

public class giaodien1 extends JFrame implements ActionListener {

private JButton tinh,reset,exit;



private JTextField gta,gtb,gtx;

private double x,a,b;

private Container cont;

private JPanel panel1,panel2,panel3;

private JLabel tieude,num1,num2,kq;

public giaodien1 (String s)

{

super (s);

cont = this.getContentPane();

tieude = new JLabel("giai phuong trinh bac nhat");

panel1 = new JPanel();

panel1.setLayout(new FlowLayout());

panel1.add(tieude);

num1= new JLabel("nhap a:");

num2=new JLabel("nhap b:");

kq=new JLabel("ket qua:");

gta=new JTextField();

gtb=new JTextField();

gtx=new JTextField();

gtx.setEditable(false);


panel2.setLayout(new GridLayout(3,2));

panel2.add(num1);

panel2.add(gta);

panel2.add(num2);

panel2.add(gtb);



panel2.add(kq);

panel2.add(gtx);

tinh =new JButton("tinh");

exit =new JButton("exit");

reset =new JButton("reset");


panel3.add(tinh);

panel3.add(reset);

panel3.add(exit);

cont.add(panel1,"North");

cont.add(panel2);

cont.add(panel3,"South");

tinh.addActionListener(this);

reset.addActionListener(this);

exit.addActionListener(this);

this.pack();

this.setVisible(true);

}

public void tinh()

{

a = Double.parseDouble(gta.getText());

b = Double.parseDouble(gtb.getText());

if (a==0) gtx.setText("gia tri a khong hop le");

else {

x = -b/a;



gtx.setText(String.valueOf(x));

}

}

public void actionPerformed(ActionEvent e)

{

if (e.getActionCommand()=="tinh")

{

tinh();

}

if (e.getActionCommand()=="reset")

{

a=0;

b=0;

gtb.setText(" ");

gta.setText(" ");

gtx.setText(" ");

}

if (e.getActionCommand()=="exit")

{

System.exit(1);

}

}

public static void main(String args[])

{

giaodien1 operator = new giaodien1 ("giao dien ");



}

}

Demo:

Bài 2:

Code:

package thuchanh;

import java.awt.Button;

import java.awt.FlowLayout;

import java.awt.Frame;

import java.awt.GridLayout;

import java.awt.Label;

import java.awt.Panel;

import java.awt.TextField;

import java.awt.event.ActionEvent;



import java.awt.event.ActionListener;

import java.awt.event.WindowEvent;

@SuppressWarnings("serial")

public class giaodien2 extends Frame implements ActionListener{

Label lb;

Label lb1;

Label lb2;

Label lb3;

static TextField txta;

static TextField txtb;

static TextField txtkq;

Button cong, tru, nhan, chia, exit, reset;

Panel pn, pn1,pn2,pn3,pn4;

public void GUI()

{

lb = new Label("minh hoa cac phep toan");

lb1 = new Label("Nhap a");

lb2 = new Label("Nhap b");

lb3 = new Label("Ket qua");

txta = new TextField();

txtb = new TextField();

txtkq = new TextField();

cong = new Button("Cong");



tru = new Button("Tru");

nhan = new Button("Nhan");

chia = new Button("Chia");

exit = new Button("Exit");

reset = new Button("Reset");

cong.addActionListener(this);

tru.addActionListener(this);

nhan.addActionListener(this);

chia.addActionListener(this);



pn = new Panel(new GridLayout(4,1));

pn1 = new Panel(new GridLayout());

pn2 = new Panel(new GridLayout(3,2));

pn3 = new Panel(new FlowLayout());


pn1.add(lb);

pn2.add(lb1);

pn2.add(txta);

pn2.add(lb2);

pn2.add(txtb);

pn2.add(lb3);

pn2.add(txtkq);

pn3.add(cong);

pn3.add(tru);

pn3.add(nhan);



pn3.add(chia);

pn4.add(exit);

pn4.add(reset);

pn.add(pn1);

pn.add(pn2);

pn.add(pn3);

pn.add(pn4);

this.add(pn);

setSize(400,300);


}

public static void cong()

{

float a = Float.parseFloat(txta.getText());

float b = Float.parseFloat(txtb.getText());

txtkq.setText(Float.toString(a + b));

}

public static void tru()

{



txtkq.setText(Float.toString(a - b));



}

public static void nhan()

{



txtkq.setText(Float.toString(a * b));

}

public static void chia()

{



txtkq.setText(Float.toString((float)a/b));

}

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

if(e.getSource() == cong)

{

cong();

}

else if(e.getSource() == tru)

{

tru();

}

else if(e.getSource() == nhan)



{

nhan();

}

else if(e.getSource() == chia)

{

chia();

}

else if(e.getSource() == reset)

{

txta.setText("");

txtb.setText("");

txtkq.setText("");

}

else

if(e.getSource() == exit)

{

System.exit(0);

}

}

public giaodien2(String s)

{

super(s);

GUI();

}

public void windowClosing(WindowEvent e)



{

System.exit(0);

}

public static void main(String []agrs)

{

new giaodien2("Minh hoa cac phep toan");

}

}

Demo:



Bài 3:

Code:

package thuchanh;














Label lb,lb1,lb2;

static TextField nhap;

static int n;

static TextField kq;

// int n;

Button tim, reset, exit;

Panel pn, pn1, pn2,pn3,pn4;

public void GUI()

{

lb = new Label("Cac so nguyen to <= n");

lb1 = new Label("Nhap n");

lb2 = new Label(" KQ ");

nhap = new TextField(5);

kq = new TextField(5);

tim = new Button("Tim");





nhap.addActionListener(this);

kq.addActionListener(this);

tim.addActionListener(this);




pn1 = new Panel(new GridLayout());




pn1.add(lb);

pn2.add(lb1);

pn2.add(nhap);

pn3.add(lb2);

pn3.add(kq);

pn4.add(tim);

pn4.add(reset);

pn4.add(exit);

pn.add(pn1);

pn.add(pn2);

pn.add(pn3);

pn.add(pn4);

this.add(pn);

setSize(400,350);


}



public static int ktra(int n)

{

if(n<=1) return 0;

if(n==2) return 1;

for(int i=2;i<n;i++)

{

if(n%i==0)

return 0;

}

return 1;

}

public static void nguyen_to()

{

n = Integer.parseInt(nhap.getText());

int i;

String k = "";

for(i=1;i<=n;i++)

{

if(ktra(i) == 1)

k += i + " ";

}

kq.setText(k);

}




{

super(s);

GUI();

}


{

new giaodien3("Tim so nguyen to");

}

@Override



if(e.getSource() == tim)

{

nguyen_to();

}


{

nhap.setText("");

kq.setText("");

}

else if(e.getSource() == exit)

{

System.exit(0);



}

}

}

Demo:

Bài 4:

Code:

package thuchanh;












import java.util.Scanner;

@SuppressWarnings({ "unused", "serial" })


Label lb;

Label lb1;

Label lb2;

TextField nhap;

TextField kq;

Button ok,reset,exit;

Panel pn,pn1,pn2,pn3,pn4;

static int n;

public void GUI()

{

lb = new Label("Kiem tra a co thuoc day fibonaci");

lb1 = new Label("Nhap a");

lb2 = new Label(" KQ ");

nhap = new TextField(20);



kq = new TextField(20);

ok = new Button("OK");



ok.addActionListener(this);








pn1.add(lb);

pn2.add(lb1);

pn2.add(nhap);

pn3.add(lb2);

pn3.add(kq);

pn4.add(ok);

pn4.add(reset);

pn4.add(exit);

pn.add(pn1);

pn.add(pn2);

pn.add(pn3);

pn.add(pn4);

this.add(pn);

setSize(400,350);



setVisible(true);

}

public void Ktra_Fibo()

{

n = Integer.parseInt(nhap.getText());

int fi1=0;

int fi2=1;

int fi;

while(true)

{

fi = fi1 + fi2;

if(fi == n)

{

kq.setText("thuoc day fibonaci"); break;

}

if(n < fi)

{

kq.setText("khong thuoc day fibonaci"); break;

}

fi1 = fi2;

fi2 = fi;

}

}

@Override





if(e.getSource() == ok)

{

Ktra_Fibo();

}


{

nhap.setText("");

kq.setText("");

}

else if(e.getSource() == exit)

{

System.exit(0);

}

}


{

super(s);

GUI();

}


{

new giaodien4("Kiem tra so thuoc day fibonaci");

}



}

Demo:

Bài 5:

Code:

package thuchanh;


import java.awt.Color;









public class giaodien5 extends Frame implements ActionListener {

Button green, blue,red,exit;

Panel pn;

public void GUI()

{

green = new Button("Green");

blue = new Button("Blue");

red = new Button("Red");


green.addActionListener(this);

blue.addActionListener(this);

red.addActionListener(this);


pn = new Panel(new FlowLayout());

pn.add(green);

pn.add(blue);

pn.add(red);

pn.add(exit);

this.add(pn);

pn.setBackground(Color.green);

setSize(350,400);

setVisible(true);

}




{

super(s);

GUI();

}

@Override



if(e.getSource() == green)

{

pn.setBackground(Color.green);

}

if(e.getSource() == blue)

{

pn.setBackground(Color.blue);

}

if(e.getSource() == red)

{

pn.setBackground(Color.red);

}

if(e.getSource() == exit)

{

System.exit(0);

}



}

public static void main(String s[])

{

new giaodien5("Doi nen");

}

}

Demo:



Bài 6:

Code:

package thuchanh;


import java.awt.Checkbox;

import java.awt.CheckboxGroup;

import java.awt.Choice;

import java.awt.Event;





import java.awt.List;




import java.awt.event.ItemEvent;

import java.awt.event.ItemListener;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import java.awt.event.WindowEvent;

import javax.xml.bind.Unmarshaller.Listener;



@SuppressWarnings({ "unused", "serial" })

public class giaodien6 extends Frame implements ItemListener{

Checkbox male,female;

List list;

Choice ch;

public static Label lb;

Button bt;

Panel pn,pn1,pn2,pn3,pn4;

public void GUI()

{

CheckboxGroup cb = new CheckboxGroup();

MyActionListener listener = new MyActionListener();

list = new List(3, false);

list.add("MS DOS");

list.add("WINDOWS");

list.add("LINUX");

list.add("UNIX");

list.addItemListener(this);

ch = new Choice();



ch.addItem("Tiger");

ch.addItem("Cat");

ch.addItem("Dog");

ch.addItemListener(this);

lb = new Label("The Item is display here");

bt = new Button("Exit");

bt.addActionListener(listener);



Checkbox male = new Checkbox("Male", cb, true);

Checkbox female = new Checkbox("Female", cb, true);

male.addItemListener(this);

female.addItemListener(this);

pn1.add(male);

pn1.add(female);




pn2.add(list);


pn3.add(ch);


pn4.add(lb);

pn4.add(bt);

pn.add(pn1);

pn.add(pn2);

pn.add(pn3);

pn.add(pn4);

this.add(pn);

setSize(400,400);

setVisible(true);

}


{

super(s);

GUI();

}

public void windowClosing(WindowEvent e )

{

System.exit(0);



}


{

new giaodien6("Item Event");

}

@Override

public void itemStateChanged(ItemEvent e) {


if(e.getStateChange() == ItemEvent.SELECTED)

{

Object temp = e.getItem();

String s = (String) temp;

lb.setText("You choice "+s);

}

}

}

class MyActionListener implements ActionListener{

@Override



System.exit(0);

}



}

Demo:

Bài 7:

Code:

package thuchanh;

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class maytinh extends JFrame implements ActionListener{

JMenuBar jmb;

JMenu edit,view,help;



JTextArea txt;

JButton butback, butce, butc,butcongtru, butmc, butmr, butms,butsqrt,butphantram,but1x,butkq,

butcham, butmcong;

JButton b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,cong,tru,nhan,chia,bang;

JPanel pn1,pn2,pn3;

public static double num1= 0, num2=0,result=0, bachai = 0;

private Container cont;

int kt = 0;

int add = 0;

int sub = 0;

int muti = 0;

int div = 0;

public maytinh (String s)

{ super (s);

butback= new JButton("Backspace");

butce=new JButton("CE");

butc=new JButton("C");

butcongtru=new JButton("+/-");

butmc=new JButton("MC");

butmr=new JButton("MR");

butms=new JButton("MS");

butsqrt=new JButton("SQRT");

butphantram=new JButton("%");

but1x=new JButton("1/x");

butkq=new JButton("");



butcham=new JButton(".");

butmcong=new JButton("M+");

b0=new JButton("0");










cong=new JButton("+");

tru=new JButton("-");

nhan=new JButton("*");

chia=new JButton("/");

bang=new JButton("=");

cont=this.getContentPane();

jmb=new JMenuBar();

edit= new JMenu("Edit");

view= new JMenu("View");

help=new JMenu("Help");

jmb.add(edit);

jmb.add(view);

jmb.add(help);

setJMenuBar(jmb);



txt=new JTextArea();

pn1=new JPanel();

pn1.setLayout(new GridLayout(1,1));

pn1.add(txt);

pn2=new JPanel();

pn2.setLayout(new FlowLayout());

pn2.add(butkq);

pn2.add(butback);

pn2.add(butce);

pn2.add(butc);

pn3=new JPanel();

pn3.setLayout(new GridLayout(4,6));

pn3.add(butmc);

pn3.add(b7);

pn3.add(b8);

pn3.add(b9);

pn3.add(chia);

pn3.add(butsqrt);

pn3.add(butmc);

pn3.add(b4);

pn3.add(b5);

pn3.add(b6);

pn3.add(nhan);

pn3.add(butphantram);

pn3.add(butms);

pn3.add(b1);



pn3.add(b2);

pn3.add(b3);

pn3.add(tru);

pn3.add(but1x);

pn3.add(butmcong);

pn3.add(b0);

pn3.add(butcongtru);

pn3.add(butcham);

pn3.add(cong);

pn3.add(bang);

cont.add(pn1,"North");

cont.add(pn2);

cont.add(pn3,"South");

bang.addActionListener(this);

butback.addActionListener(this);

cong.addActionListener(this);

tru.addActionListener(this);

nhan.addActionListener(this);

chia.addActionListener(this);

b0.addActionListener(this);












butcongtru.addActionListener(this);

butcham.addActionListener(this);

but1x.addActionListener(this);

butphantram.addActionListener(this);

butsqrt.addActionListener(this);

butc.addActionListener(this);

this.pack();


}

public double read()

{

double x;

x= Double.valueOf(txt.getText());

return x;

}

public double canx()

{

double x;

x=Double.valueOf(txt.getText());

return (double)Math.sqrt(x);

}

public double phantram()

{



double phantram;

phantram = Double.valueOf(txt.getText());

return (double) phantram/100;

}

public double chiax()

{

double chiax;

chiax = Double.valueOf(txt.getText());

return (double)1/chiax;

}



Object source = e.getSource();

try{

if(source==b1)

txt.append("1");

if(source==b2)

txt.append("2");

if(source==b3)

txt.append("3");

if(source==b4)

txt.append("4");

if(source==b5)

txt.append("5");

if(source==b6)

txt.append("6");



if(source==b7)

txt.append("7");

if(source==b8)

txt.append("8");

if(source==b9)

txt.append("9");

if(source==b0)

txt.append("0");

if(source==butc)

txt.setText("");

if(source == butsqrt)

{

bachai = canx();

txt.setText(Double.toString(bachai));

}

if(source == but1x)

{

txt.setText(Double.toString(chiax()));

}

if(source == butphantram)

{

txt.setText(Double.toString(phantram()));

}

if(source==cong)



{

num1 = read();

txt.setText("");

add = 1;

sub = 0;

div = 0;

muti = 0;

}

if(source == tru)

{

num1 = read();

txt.setText("");

add = 0;

sub = 1;

div = 0;

muti = 0;

}

if(source == nhan)

{

num1 = read();

txt.setText("");

add = 0;

sub = 0;

div = 0;

muti = 1;

}



if(source == chia)

{

num1 = read();

txt.setText("");

add = 0;

sub = 0;

div = 1;

muti = 0;

}

if(source == butback)

{

setTexttxt(getStringOnDisplay().substring(0, getStringOnDisplay().length()-1));

}

if(source == butcongtru)

{

changeSign();

}

if(source == butce)

{

txt.setText("0.0");

}

if(source == bang)

{

num2 = Double.valueOf(txt.getText());

{



if(add == 1)

{

result = num1 + num2;

txt.setText(Double.toString(result));

}

if(sub == 1)

{

result = num1 - num2;


}

if(div == 1)

{

result = (double)num1/num2;


}

if(muti ==1)

{

result = (double)num1*num2;


}

}

}

}catch(Exception e1){};



}

private void setTexttxt(String s) {


txt.setText(s);

}

private String getStringOnDisplay() {


return txt.getText();

}

public void changeSign()

{

if(Double.parseDouble(txt.getText()) < 0)

{

setTexttxt(getStringOnDisplay().substring(1));

}

if(Double.parseDouble(txt.getText()) > 0)

{

setTexttxt(Double.toString(getNumberInDisplay() * -1));

}

}

public double getNumberInDisplay()

{



String stuff = txt.getText();

return Double.parseDouble(stuff);

}

public static void main(String args[])

{

maytinh operator = new maytinh ("May tinh bo tui ");

}

}

Demo:



Buổi 3:

Bài 1:

Code:

package Ketnoicsdl_1;import java.sql.*;import java.util.*;import java.awt.*;import java.awt.event.*;

import javax.swing.*;public class giao_dien extends JFrame implements ActionListener {



JLabel nhap,tim,maso;JTextArea input;JButton timkiem,reset,exit;Vector vData=null,vTitle=null;JScrollPane tableResult;JRadioButton ms,ht,ns,dc,gt;

Container cont; ButtonGroup bg; double click=0;

JPanel pn1,pn2,pn3;String ip1="ID",ip2="0";

public giao_dien(String s) throws SQLException { vera(); }

public void vera() throws SQLException{ bg=new ButtonGroup(); nhap=new JLabel("Nhap thong tin muon tim"); tim=new JLabel("Tim kiem theo"); input=new JTextArea(); input.setText("Nhap thong tin muon tim"); input.setEditable(true); timkiem=new JButton("Searh"); reset=new JButton("Reset"); exit=new JButton("Exit"); ms=new JRadioButton("Ma so"); ht=new JRadioButton("Ho Ten"); ns=new JRadioButton("Ngay sinh"); dc=new JRadioButton("Dia chi"); gt=new JRadioButton("Gioi tinh"); bg.add(ms); bg.add(ht); bg.add(ns); bg.add(dc); bg.add(gt); pn1=new JPanel(); pn2=new JPanel(); pn3=new JPanel(); pn3.setLayout(new FlowLayout()); pn1.setLayout(new GridLayout(1,5)); pn2.setLayout(new FlowLayout()); pn1.add(nhap); pn1.add(input); pn1.add(timkiem); pn1.add(reset); pn1.add(exit); pn2.add(tim); pn2.add(ms);



pn2.add(ht); pn2.add(ns); pn2.add(dc); pn2.add(gt); timkiem.addActionListener(this); reset.addActionListener(this); exit.addActionListener(this); cont=this.getContentPane(); output(ip1,ip2);

/*Tạo baTng đểT chứa thông tin truy vấZn từ cơ sơT dữ liệu*/

tableResult = new JScrollPane(new JTable(vData,vTitle));

/*Tạo cửTa sôT chứa baTng dữ liệu*/pn3.add(tableResult);

cont.add(pn1,"North"); cont.add(pn2); cont.add(pn3,"South"); this.pack(); this.setLocationRelativeTo(null);


}

public void actionPerformed(ActionEvent e) {Object source = e.getSource();if (source==exit) System.exit(1);if (source==reset) {

click=0;ip1="ID";ip2="0";try {

vera();} catch (SQLException e1) {

// TODO Auto-generated catch blocke1.printStackTrace();

}

}if (source==timkiem){ click=1;

if (ms.isSelected()) {

ip2=input.getText();



ip1="ID"; try {

output(ip1,ip2);} catch (SQLException e1) {


} try {



} } if (ht.isSelected()) {

ip1="Ho Ten"; ip2="'%"+input.getText()+"%'"; try {



} if (click==1) { try {



} } if (ns.isSelected()) {

ip1="Ngay sinh"; ip2="'"+input.getText()+"'"; try {



} try {



} }



if (dc.isSelected()) {

ip1="Dia chi"; ip2=input.getText(); try {



} try {



} } if (gt.isSelected()) {

ip1="Gioi tinh"; ip2=input.getText(); try {



} try {



} } }}

}public void output(String s1,String s2) throws SQLException{

try {

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");



//Ket noi co so du lieu va taoý doi tuong StatementString url="jdbc:odbc:milo";Connection conn=DriverManager.getConnection(url);Statement sm=conn.createStatement();

//Chèn thểm thông tin vào baTng

ResultSet rs=sm.executeQuery("Select * from Table1 where "+s1+"="+s2);

ResultSetMetaData rsm=rs.getMetaData();int col_num =rsm.getColumnCount();

//ChuấTn bị dữ liệu đểT tạo baTng (JTable) hiểTn thị thông tin vTitle chứa đựng thông tin tển cột cuTa baTng

vTitle =new Vector(col_num);for (int i = 1; i <= col_num; i++) {

vTitle .add(rsm.getColumnLabel(i)) ;}

//vData chứa nội dung cuTa baTng//mi dung vecto cai nay met lam,dung tabel cho nhanh,

dùng sao , sửTa trực tiểp bài này đi//sua lau lam ta dung cai hom truoc viet cho mi nhe

//mi tao 1 cai table trong my sql di bang khach hang do//cai my sql ta chua lam bao gio

vData=new Vector(10,10);while (rs.next()) {

Vector row =new Vector(col_num);for (int i = 1; i <= col_num; i++)

row.add(rs.getString(i));vData .add(row) ;

}rs.close();sm.close();conn.close();

} catch (ClassNotFoundException e) {

e.printStackTrace();}

}

}//class Mainpackage Ketnoicsdl_1;



import java.sql.SQLException;

public class Main {public static void main(String args[]) throws SQLException{

giao_dien gd = new giao_dien("demo");}}

Demo:



Bài 2:

import java.awt.Checkbox;

public class truyvan extends JFrame implements ActionListener,ItemListener{

JButton bt1, bt2, bt3,bt4,bt5,bt6,bt7,bt8;

JTextField tf1,tf2;

Panel pn, p1,p2,p3 ;

Checkbox cb1,cb2,cb3,cb4,cb5;

CheckboxGroup cg;

JLabel l1,l2;

Connection conn;



Statement sm ;

JTable tb1;

JScrollPane tbR ;

Vector vData = null;

Vector vTitle = null;

DefaultTableModel model;

ResultSet rs;

String truyvan;

String sql= "Select * from ThongTin";

public truyvan(){

setTitle("Tim Kiem");


p1 = new Panel(new FlowLayout());

p2 = new Panel(new FlowLayout());

p3 = new Panel(new GridLayout(1,1));

// P1

l1 = new JLabel("Nhap noi dung");

tf1= new JTextField(30);

bt1 = new JButton("Tim Kiem");

bt2 = new JButton("Reset");

bt3 = new JButton("Exit");

p1.add(l1);

p1.add(tf1);

p1.add(bt1);

p1.add(bt2);

p1.add(bt3);

bt1.addActionListener(this);



pn.add(p1);



//P2

cg= new CheckboxGroup();

cb1 = new Checkbox("MaSo",cg,false);

cb1.addItemListener(this);

cb2 = new Checkbox("HoTen",cg,false);


cb3 = new Checkbox("NgaySinh",cg,false);


cb4 = new Checkbox("DiaChi",cg,false);


cb5 = new Checkbox("GioiTinh",cg,false);


l2 = new JLabel("Tim Kiem Theo");

p2.add(l2);

p2.add(cb1);

p2.add(cb2);

p2.add(cb3);

p2.add(cb4);

p2.add(cb5);

pn.add(p2);

tf2 = new JTextField("");

//-------------------

try{

load(sql);

model = new DefaultTableModel(vData,vTitle);

tb1 = new JTable(model);

tbR = new JScrollPane(tb1);

p3.add(tbR);

pn.add(p3);

}catch(Exception e){



System.out.println(e);

}

add(pn);

setSize(700,300);

setResizable(false);

setVisible(true);

addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent we){

setVisible(false);

System.exit(0);

}

});

}

public void load(String sql){

try{

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

String url="jdbc:odbc:ThongTin";

conn=DriverManager.getConnection(url,"Login","Password");

sm = conn.createStatement();

rs=sm.executeQuery(sql);

ResultSetMetaData rsm=rs.getMetaData();

int socot = rsm.getColumnCount();

vTitle = new Vector(socot);

for(int i=1;i<=socot;i++){

vTitle.add(rsm.getColumnLabel(i));

}

vData = new Vector(10,10);

while(rs.next())



{

Vector row = new Vector(socot);

for(int i =1 ; i<=socot;i++){

row.add(rs.getString(i));

}

vData.add(row);

}

rs.close();

sm.close();

conn.close();

}catch(Exception e){

System.out.println(e);

}

}

public static void main(String[] args) throws ClassNotFoundException,SQLException{

new truyvan();

}

@Override


if(e.getSource()==bt1){

if(truyvan == "MaSo"){

truyvan ="select * from ThongTin where "+truyvan+"="+tf1.getText();

}

else{

truyvan ="select * from ThongTin where "+truyvan+"='"+tf1.getText()+"'";

}

load(truyvan);

tb1.setModel(new DefaultTableModel(vData,vTitle));



}

else if(e.getSource()==bt2){

cg.setSelectedCheckbox(null);

tf1.setText("");

load(sql);

tb1.setModel(new DefaultTableModel(vData,vTitle));

}

else System.exit(0);

}

//-------------------------------------------------------------------------

@Override

public void itemStateChanged(ItemEvent e) {

if(e.getSource()==cb1)truyvan= "MaSo";

else if(e.getSource()==cb2)truyvan= "HoTen";

else if(e.getSource()==cb3)truyvan= "NgaySinh";

else if(e.getSource()==cb4)truyvan= "DiaChi";

else truyvan= "GioiTinh";

}

}

Demo:




Documents

Baocao ltjava