[英]Java - Saving each line of text instead of replacing it
每次我在文本框中输入内容并按Enter时,我都可以在“ Uneditabletest”中看到该消息,但是,如果我编写不同的内容并按Enter键,它将替换我的上一条消息,我该怎么做他们一个接一个地保存了吗? 就像是聊天或类似内容一样。
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);
}
}
只需将其附加到末尾即可。 在这种情况下,它将是jtfUneditableText.setText(jtfUneditableText.getText() + "\\n" + disp)
jtfUneditableText中应该有类似getText()的东西,因此您可以执行jtfUneditableText.setText(jtfUneditableText.getText() + "\\n" + disp);
因此,jtfUneditableText中的文本将是之前的内容(jtfUneditableText.getText())加上换行符(\\ n)和新文本。
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