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();

        }

    }

}