bohui0714
发贴: 9
积分: 0
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于 2005-07-16 16:51
//你太马虎了 //java:6和java:7的错误是分号是全角的 //java:21,错误是“+”号是全角的 //java:24,你的事件响应程序写到了class BtnActionAdapter的外边 import java.awt.*; import java.applet.*; import java.awt.event.*;
public class t1 extends Applet{ TextField in=new TextField(10); Button btn=new Button("Button 1"); Label out=new Label("Result"); public void init(){ setLayout(new FlowLayout()); add(in); add(btn); add(out); btn.addActionListener(new BtnActionAdapter()); } class BtnActionAdapter implements ActionListener{ public void actionPerformed(ActionEvent e){ String s=in.getText(); double d=Double.parseDouble; double sq=d*d; out.setText(d+" Square"+sq); } } }
bohui0714 edited on 2005-07-16 16:57
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