eventhandleframe.java

递归子程序法：对应每个非终结符语法单元编一个独立的处理过程（或子程序）。语法分析从读入第一个单词开始

	package eventhandle;
	/** 
	 * Java语言实验参考程序
	 * Company 北京师范大学计算机系
 
	 * @author 孙一林
	 * @version 1.0
	 */
	import java.awt.*;
	import java.awt.event.*;
	public class EventHandleFrame extends Frame {
	  Button button = new Button();
	  Label label1 = new Label();
	  Label label2 = new Label();
	  TextField textField1 = new TextField();
	  TextField textField2 = new TextField();
	  public EventHandleFrame() {
	    try {
	      Init();
	    }
	    catch(Exception e) {
	      e.printStackTrace();
	    }
	  }
	  public static void main(String[] args) {
	    EventHandleFrame eventHandleFrame = new EventHandleFrame();
	    eventHandleFrame.setSize(400,300);
	    eventHandleFrame.show();
	  }
	  private void Init() throws Exception {
	    this.setTitle("事件监听器和适配器类实验");
	    this.setLayout(null);
	    button.setLabel("单击按钮退出程序");
	    button.setBounds(new Rectangle(63, 152, 240, 30));
	    label1.setText("鼠标X坐标值：");
	    label1.setBounds(new Rectangle(28, 30, 96, 41));
	    label2.setText("鼠标Y坐标值：");
	    label2.setBounds(new Rectangle(27, 76, 104, 41));
	    textField1.setText("X值");
	    textField1.setBounds(new Rectangle(147, 30, 115, 34));
	    textField2.setText("Y值");
	    textField2.setBounds(new Rectangle(146, 82, 119, 35));
	    this.add(textField2, null);
	    this.add(textField1, null);
	    this.add(label2, null);
	    this.add(label1, null);
	    this.add(button, null);
	    button.addActionListener(new java.awt.event.ActionListener() {
	      public void actionPerformed(ActionEvent e) {
	        button_actionPerformed(e);
	      }
	    });
	    /* ============== 开始添加按钮事件监听器和适配器类代码 ============== */
	    this.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
	      public void mouseMoved(MouseEvent e) {		// 监听鼠标移动事件
	        this_mouseMoved(e); 						// 指向事件处理方法
	      }
	    });
	    /* ============== 添加按钮事件监听器和适配器类代码结束 ============== */
	  }
	  void button_actionPerformed(ActionEvent e) {		// 事件处理方法
	    dispose();
	    System.exit(1);
	  }
	  /* ================= 开始添加鼠标移动处理方法代码 =================== */
	  void this_mouseMoved(MouseEvent e) {		// 从事件e中获取鼠标的X、Y值
	    textField1.setText(String.valueOf(e.getX()));	// 将X转换为字符串显示
	    textField2.setText(String.valueOf(e.getY()));	// 将Y转换为字符串显示
	  }
	  /* ================= 添加鼠标移动处理方法代码结束 ================== */
	}