Java - 保存每行文本而不是替换它

Z时代
2024-01-10
分类：问答

每当我在文本框中写入内容并按下回车键时，我能够在“Uneditabletest”中看到该消息，但是，如果我写入了不同的内容并按下Enter键它会取代我最后的信息，我该如何让他们一个接一个地保存？就好像它是一个聊天或类似的东西。Java - 保存每行文本而不是替换它

import javax.swing.*; 
import java.awt.*; 
import java.awt.event.*; 
public class Tutorial extends JFrame { 
JTextField jtfText1, jtfUneditableText; 
String disp = ""; 
TextHandler handler = null; 
public Tutorial() { 
    super("TextField Test Demo"); 
    Container container = getContentPane(); 
    container.setLayout(new FlowLayout()); 
    jtfText1 = new JTextField(10); 
    jtfUneditableText = new JTextField("Uneditable text field", 20); 
    jtfUneditableText.setEditable(false); 
    container.add(jtfText1); 
    container.add(jtfUneditableText); 
    handler = new TextHandler(); 
    jtfText1.addActionListener(handler); 
    jtfUneditableText.addActionListener(handler); 
    setSize(325, 100); 
    setVisible(true); 
} 
private class TextHandler implements ActionListener { 
    @Override 
    public void actionPerformed(ActionEvent e) { 
     if (e.getSource() == jtfText1) { 
      disp = "text1 : " + e.getActionCommand(); 
     } else if (e.getSource() == jtfUneditableText) { 
      disp = "text3 : " + e.getActionCommand(); 
     } 
     jtfUneditableText.setText(disp); 
     } 
    } 
    public static void main(String args[]) { 
     Tutorial test = new Tutorial(); 
     test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    } 
}