frame1.java

jbuilder2005

package textcomponenttest;

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

public class Frame1
    extends JFrame {
  JPanel contentPane;
  TextField textField1 = new TextField();
  TextArea textArea1 = new TextArea();
  Button button1 = new Button();
  FlowLayout flowLayout1 = new FlowLayout();
  public Frame1() {
    try {
      setDefaultCloseOperation(EXIT_ON_CLOSE);
      jbInit();
    }
    catch (Exception exception) {
      exception.printStackTrace();
    }
  }

  /**
   * Component initialization.
   *
   * @throws java.lang.Exception
   */
  private void jbInit() throws Exception {
    contentPane = (JPanel) getContentPane();
    contentPane.setLayout(flowLayout1);
    setSize(new Dimension(300, 150));
    setTitle("复制文本");
    button1.setLabel("复制");
    button1.addActionListener(new Frame1_button1_actionAdapter(this));
    textArea1.setColumns(40);
    textArea1.setRows(5);
    textArea1.setText("文本组件包括两种："+"\n"  //在属性列表中用<NL>代替"\n"表示回车换行
                      +"TextField（文本框）和TextArea（文本区）。"+"\n"
                      +"这两种组件都是用户输入文本的工具。"+"\n"
                      +"文本框允许用户输入单行文本。"+"\n"
                      +"文本区则可以输入多行文本。");
    textField1.setColumns(20);
    contentPane.add(textArea1);
    contentPane.add(button1);
    contentPane.add(textField1);
  }

  public void button1_actionPerformed(ActionEvent e) {
    if (textArea1.getSelectionEnd()==textArea1.getSelectionStart())
                     //选取文本的起止位置相同，即没有选取文本

      textField1.setText("没有选取文本");
    else
      textField1.setText(textArea1.getSelectedText());
  }
}

class Frame1_button1_actionAdapter
    implements ActionListener {
  private Frame1 adaptee;
  Frame1_button1_actionAdapter(Frame1 adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.button1_actionPerformed(e);
  }
}