[英]Java - Saving each line of text instead of replacing it
每次我在文本框中輸入內容並按Enter時,我都可以在“ Uneditabletest”中看到該消息,但是,如果我編寫不同的內容並按Enter鍵,它將替換我的上一條消息,我該怎么做他們一個接一個地保存了嗎? 就像是聊天或類似內容一樣。
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);
}
}
只需將其附加到末尾即可。 在這種情況下,它將是jtfUneditableText.setText(jtfUneditableText.getText() + "\\n" + disp)
jtfUneditableText中應該有類似getText()的東西,因此您可以執行jtfUneditableText.setText(jtfUneditableText.getText() + "\\n" + disp);
因此,jtfUneditableText中的文本將是之前的內容(jtfUneditableText.getText())加上換行符(\\ n)和新文本。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.