Swing 滚动条

//滚动条，滚动条加给谁，我们就需要把那个组件作为滚动条的参数， 下面看这个例子

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class TestFrame extends JFrame{

public static void main(String[] args) {

TestFrame frame = new TestFrame1();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);

}
private JTextArea jta = new JTextArea(8,40);
private JScrollPane jsp = new JScrollPane(jta); //添加滚动条
JButton button1 = new JButton(”REPLACE”);
JTextField jt1 = new JTextField(6);
JLabel l1 = new JLabel(”with”);
JTextField jt2 = new JTextField(6);
JPanel buttonPanel = new JPanel();
public TestFrame1(){
setSize(400,300);
setTitle(”TextAreaTest”);
setLayout(new BorderLayout());
jta.setText(”helloworld”);
add(jsp,BorderLayout.CENTER);
buttonPanel.add(button1);
buttonPanel.add(jt1);
buttonPanel.add(l1);
buttonPanel.add(jt2);
add(buttonPanel,BorderLayout.SOUTH);
button1.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String str1 = jta.getText();
String str2 = jt1.getText();
String str3 = jt2.getText();
jta.setText(str1.replaceAll(str2, str3));

}
});

}

}

评论

1 楼 国仔饼 2011-12-20  

程序有很多小错误，请lz注意