4乘4按鈕

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Test
{


public static void main(String[] args)
{
JFrame jtfMainFrame = new JFrame("Which Button Demo");
jtfMainFrame.setSize(450, 150);
JPanel jplPanel = new JPanel();
int i;
int j=1;
int num1 , num2;
JButton jbnButton[]  = new JButton[16];
JButton changeButton[] = new JButton[2];
jplPanel.setLayout (new GridLayout(4, 4));
for(i = 0;i<=15;i++){
 jbnButton[i]=new JButton(""+(i+1));
 jplPanel.add(jbnButton[i]);
 String s = Integer.toString(i+1);
 jbnButton[i].addActionListener(new ActionListener() {

   public void actionPerformed(ActionEvent e) {
 /*if(j<2){
  changeButton[j] = jbnButton[i];
  num1 = i;
  j++;
 }
 else if(j==2){
  changeButton[j]=jbnButton[i];
  jbnButton[num1] = changeButton[j];
  jbnButton[i] = changeButton[j-1];
  j=1;
 }*/
 //j++;
 //JButton btn = (JButton[i])e.getSourec();
 //lab.setText(btn.getLabel+".");
 System.out.println(""+s);
   }
  });
}

jtfMainFrame.getContentPane().add(jplPanel, BorderLayout.CENTER);
jtfMainFrame.setVisible(true);
System.out.print("盧楷中\n");
}
}

java 9乘9乘法

public class Test
{
    public static void main(String args[])
    {
        int i=1,k;
        do{
            k=1;
            do
            {
                System.out.print(i+"*"+k+"="+(i*k)+"\t");
                k++;
            }while (k<=9);

            System.out.println();
            i++;
        }while(i<=9);
    }
}

JAVA 兩個按鈕與文字方格

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class Test {
public static void main(String args[])
{
JFrame jtfMainFrame = new JFrame("Which Button Demo");
jtfMainFrame.setSize(150, 150);
JButton jbnButton1 = new JButton("Button 1");
JButton jbnButton2 = new JButton("Button 2");
JPanel jplPanel = new JPanel();
JTextField jtfInput = new JTextField(20);
jplPanel.add(jbnButton1);
jplPanel.add(jbnButton2);
jplPanel.add(jtfInput);

jtfMainFrame.getContentPane().add(jplPanel, BorderLayout.CENTER);
jtfMainFrame.setVisible(true);

System.out.print("hi");
}

}

java 迴圈製作按鍵

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Test
{


public static void main(String[] args)
{
JFrame jtfMainFrame = new JFrame("Which Button Demo");
jtfMainFrame.setSize(450, 150);
JPanel jplPanel = new JPanel();
int i;
int j=1;
JButton jbnButton[]  = new JButton[9];
for(i = 0;i<=8;i++){
//JButton  jbnButton1 = new JButton("Button 1")
//jbnButton[i] = new JButton();
jbnButton[i]=new JButton("Button"+(i+1));
jplPanel.add(jbnButton[i]);
String s = Integer.toString(i+1);
jbnButton[i].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {
System.out.println("Button"+s);
}
});
}

jtfMainFrame.getContentPane().add(jplPanel, BorderLayout.CENTER);
jtfMainFrame.setVisible(true);
System.out.print("chih-yu hsu");
}
}

java 1~10

class Test  {
    public static void main(String[] args) {
         int i;
        for (i = 1; i <= 10; i++) {
            System.out.println(i);
        }
    }
}

按鈕排列

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

class Test

{

public static void main(String[] args)

{

JFrame jtfMainFrame = new JFrame("Which Button Demo");

jtfMainFrame.setSize(450, 150);

JPanel jplPanel = new JPanel();

int i;

int j=1;

int num1 , num2;

JButton jbnButton[]  = new JButton[9];

JButton changeButton[] = new JButton[2];

jplPanel.setLayout (new GridLayout(3, 3));

for(i = 0;i<=8;i++){

 jbnButton[i]=new JButton("Button"+(i+1));

 jplPanel.add(jbnButton[i]);

 String s = Integer.toString(i+1);

 jbnButton[i].addActionListener(new ActionListener() {

   public void actionPerformed(ActionEvent e) {

 /*if(j<2){

  changeButton[j] = jbnButton[i];

  num1 = i;

  j++;

 }

 else if(j==2){

  changeButton[j]=jbnButton[i];

  jbnButton[num1] = changeButton[j];

  jbnButton[i] = changeButton[j-1];

  j=1;

 }*/

 //j++;

 //JButton btn = (JButton[i])e.getSourec();

 //lab.setText(btn.getLabel+".");

 System.out.println("Button"+s);

   }

  });

}

jtfMainFrame.getContentPane().add(jplPanel, BorderLayout.CENTER);

jtfMainFrame.setVisible(true);

System.out.print("chih-yu hsu");

}

}

設置九個按鈕且有反應

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Test
{


public static void main(String[] args)
{
JFrame jtfMainFrame = new JFrame("Which Button Demo");
jtfMainFrame.setSize(450, 150);
JButton  jbnButton1 = new JButton("Button 1");
JButton  jbnButton2 = new JButton("Button 2");
JButton  jbnButton3 = new JButton("Button 3");
JButton  jbnButton4 = new JButton("Button 4");
JButton  jbnButton5 = new JButton("Button 5");
JButton  jbnButton6 = new JButton("Button 6");
JButton  jbnButton7 = new JButton("Button 7");
JButton  jbnButton8 = new JButton("Button 8");
JButton  jbnButton9 = new JButton("Button 9");
jbnButton1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e)
{
System.out.print("Button 1!");
}
});
jbnButton2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e)
{
System.out.print("Button 2!");
}
});
jbnButton3.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e)
{
System.out.print("Button 3!");
}
});
jbnButton4.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e)
{
System.out.print("Button 4!");
}
});
jbnButton5.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e)
{
System.out.print("Button 5!");
}
});
jbnButton6.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e)
{
System.out.print("Button 6!");
}
});
jbnButton7.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e)
{
System.out.print("Button 7!");
}
});
jbnButton8.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e)
{
System.out.print("Button 8!");
}
});
jbnButton9.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e)
{
System.out.print("Button 9!");
}
});




JPanel jplPanel = new JPanel();
jplPanel.add(jbnButton1);
jplPanel.add(jbnButton2);
jplPanel.add(jbnButton3);
jplPanel.add(jbnButton4);
jplPanel.add(jbnButton5);
jplPanel.add(jbnButton6);
jplPanel.add(jbnButton7);
jplPanel.add(jbnButton8);
jplPanel.add(jbnButton9);
jtfMainFrame.getContentPane().add(jplPanel, BorderLayout.CENTER);
jtfMainFrame.setVisible(true);
System.out.print("chih-yu hsu");
}
}