如何在 Java 中向 JTextArea 追加文本?


要向 JTextArea 追加文本,请使用组件的 append() 方法。假设 JTextArea 中有以下文本 -

JTextArea textArea = new JTextArea("The text added here is just for demo. "+ "
This demonstrates the usage of JTextArea in Java. ");

现在,向同一 textArea 追加文本 -

textArea.append("In this example we have deleted some text from the beginning."+ "
We have also appended some text.");

以下是如何向 JTextArea 追加文本的示例 -

示例

package my;
import java.awt.GridLayout;
import javax.swing.*;
public class SwingDemo {
   SwingDemo() {
      JFrame frame = new JFrame("Demo");
      JTextArea textArea = new JTextArea("The text added here is just for demo. "+ "
This demonstrates the usage of JTextArea in Java. ");       int begn = 0;       int end = 10;       textArea.replaceRange(null, begn, end);       textArea.append("In this example we have deleted some text from the beginning."+ "
We have also appended some text.");       frame.add(textArea);       frame.setSize(550,300);       frame.setLayout(new GridLayout(2, 2));       frame.setVisible(true);    }    public static void main(String args[]) {       new SwingDemo       ();    } }

输出


更新时间:2019 年 7 月 30 日

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