JTextArea Demo

package swing.jtextarea;

import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;

public class JTextAreaFillDemo {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                JTextAreaFrame frame = new JTextAreaFrame();
                frame.setTitle(frame.getClass().getSimpleName());
                frame.setSize(400, 300);
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
                frame.setLocationRelativeTo(null);
            }
        });
    }
}

class JTextAreaFrame extends JFrame {
    private static final long serialVersionUID = 8390788205754221692L;
    private JTextArea jtextarea;

    public JTextAreaFrame() {
        jtextarea = new JTextArea();
        JScrollPane scrollPane = new JScrollPane(jtextarea);
        this.add(scrollPane, BorderLayout.CENTER);
        fillJTextArea();
    }

    public void fillJTextArea() {
        new Thread(new Runnable() {// 启动数据获取，更新显示进程
                    public void run() {
                        JTextAreaFiller d = new JTextAreaFiller(jtextarea);
                        d.fillJtextArea();
                    }
                }).start();
    }

}

package swing.jtextarea;

import java.util.concurrent.TimeUnit;

import javax.swing.JTextArea;

public class JTextAreaFiller {
    private JTextArea jTextArea;

    public JTextAreaFiller(JTextArea jTextArea) {
        this.jTextArea = jTextArea;
    }

    public void fillJtextArea() {
        try {
            for (int i = 0; i < 10000; i++) {
                System.out.println("当前数据为：" + i);
                jTextArea.append("当前数据为：" + i + "\n"); // 调用主窗口的jtextarea进行添加数据，显示
                TimeUnit.SECONDS.sleep(1);
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }

    }
}