JAVA 事件傾聽機制

1. JAVA事件傾聽機制 • 要改成為輸入6個號碼,用產生器,產生出要買幾次樂透後才會出現輸入的6個號碼相同

2. import java.lang.*; import java.awt.*; import java.awt.event.*; //要用到 MouseAdapter 等 import javax.swing.*; //要用到 JOptionPane public class j03100401 extends Frame { int[] nums; //用來存已取得的號碼 Panel P1; TextField T1 ,T2,T3,T4,T5,T6; Button B1,B2; public j03100401() { this.setLayout(null); //手動指定各元件的位置 P1 = new Panel(); P1.setBounds(20,35,250,28); GridLayout layout = new GridLayout(1,0); layout.setHgap(15); P1.setLayout(layout); P1.setEnabled(false); //不讓游標進入 T1~T6 this.add(P1);

3. //T1~T6 都加到 P1 內 T1 = new TextField(); P1.add(T1); T2 = new TextField(); P1.add(T2); T3 = new TextField(); P1.add(T3); T4 = new TextField(); P1.add(T4); T5 = new TextField(); P1.add(T5); T6 = new TextField(); P1.add(T6); B1 = new Button("清除"); B1.setBounds(50,80,60,28); B1.addMouseListener( new MouseAdapter() { public void mouseClicked(MouseEvent e) { T1.setText(""); T2.setText(""); T3.setText(""); T4.setText(""); T5.setText(""); T6.setText(""); } }); this.add(B1);

4. B2 = new Button("開始選號"); B2.setBounds(130,80,100,28); //=========================================== B2.addMouseListener( new MouseAdapter() { public void mouseClicked(MouseEvent e) { nums = new int[6]; for(int x=0;x<nums.length;x++) { nums[x]=(int)(Math.random()*42) + 1 ; //1~42 其中一個整數 //0.0 <= Math.random() < 1.0 //0.0 <= Math.random()*42 < 42.0 System.out.print(nums[x] + " "); //上行用來測試，可看選到的重複號碼 for(int y=0; y<x; y++) { //和之前選好的號碼比較 if(nums[x]==nums[y]) //如果有重複 x = x-1; //這次的再重新選 } }

5. System.out.println(); T1.setText(String.valueOf(nums[0])); T2.setText(String.valueOf(nums[1])); T3.setText(String.valueOf(nums[2])); T4.setText(String.valueOf(nums[3])); T5.setText(String.valueOf(nums[4])); T6.setText(String.valueOf(nums[5])); } //void mouseClicked(MouseEvent e) end }); //end of B2.addMouseListener(); this.add(B2); //=========================================== this.setBounds(200,100,290, 130); this.setTitle("樂透號碼產生器"); this.setBackground(Color.PINK); this.addWindowListener( new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); //結束系統 } }); this.setVisible(true); } //public j03100401() end public static void main(String[] para) { new j03100401(); } } //public class j03100401 end