2015/5/8 隨機亂數陣列

import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.util.Arrays;

public class button
{
  public static void main(String[] args) throws IOException
  {
    JFrame frame = new JFrame("作業GridLayout)");
    GridLayout f1=new GridLayout(4, 13);

    Container c=frame.getContentPane();

    c.setLayout(f1);
 
    int [] num = new int[16]; //宣告一個數字陣列，用來記錄產生過的亂數
    Arrays.fill(num,-1); //將陣列內容全都設為-1
    int i=1;
    do{
      int j=(int)(Math.random()*16);
      if(num[j] == 0) continue; //判斷是否亂數取出的數字是否出現過
      num[j] = 0;//將出現過的數字索引值的陣列內容設為0，代表出現過
      c.add(new JButton("第"+j+"個"));
      i++;
    }while(i<=16);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(300,300);
    frame.setVisible(true);
  }
}

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import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class Calculator extends JFrame implements ActionListener{

public static void main(String[]args){

new Calculator();

}

public Calculator()

{

String s;

JFrame window=new JFrame("Calculator");

window.setDefaultLookAndFeelDecorated(true);

window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

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

JPanel jplPanel = new JPanel();

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

JButton button[]=new JButton[10];

//s=Integer.toString(1);

s=String.valueOf(1);

//System.out.println(s);

//s="1";

for (int i = 1; i <= 9; i++)

{

button[i] = new JButton();

button[i].setActionCommand(s);

button[i].addActionListener(this);

button[i].setSize(50,50);

button[i].setText(Integer.toString(i));

jplPanel.add(button[i]);

}

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

window.setSize(500,500);

window.setVisible(true);

}

public void actionPerformed(ActionEvent e) {

        String cmd = e.getActionCommand();

        System.out.println(cmd);

        if (cmd == "1") {

          

            System.out.println("Yes....");

        }

    }

}