Java---滚动字小项目-

package Thread;

import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class WelcomeJFrame extends JFrame {

  public WelcomeJFrame(String texts[]) {
    super("滚动字");
    Dimension dim = getToolkit().getScreenSize(); // 获得系统屏幕宽、高
    setBounds(dim.width / 4, dim.height / 4, dim.width / 2 + 50,
        dim.height / 2);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    if (texts == null || texts.length == 0) { // 保证有一栏
      this.getContentPane().add(new RollbyJPanel("Welcome"));
    } else {
      this.getContentPane().setLayout(new GridLayout(texts.length, 1));
      for (int i = 0; i < texts.length; i++) {
        this.getContentPane().add(new RollbyJPanel(texts[i])); // 每一个字符串都new一块面板
      }
    }
    setVisible(true);
  }

  public WelcomeJFrame() {

    this(null); // 空的构造函数
  }

  private class RollbyJPanel extends JPanel implements ActionListener,
      Runnable {
    private JTextField text_word, text_sleep, text_state;
    private JButton button_start, button_intterupt;
    int sleeptime;
    Thread thread;

    RollbyJPanel(String text) {
      this.setLayout(new GridLayout(2, 1)); // 设置一个面板的的布局为网格布局两行一列
      text_word = new JTextField(String.format("%225s", text)); // 将字符串显示在文本条中
      this.add(text_word);

      JPanel panel_sub = new JPanel();
      this.add(panel_sub);
      panel_sub.add(new JLabel("sleep"));
      this.sleeptime = (int) (Math.random() * 100); // 生成一个0到1的随机数
      text_sleep = new JTextField("" + this.sleeptime, 5); // 将随机生成的数加入到sleep文本框中，并且设置文本条长度为5px
      panel_sub.add(text_sleep);
      text_sleep.addActionListener(this);

      button_start = new JButton("启动");
      panel_sub.add(button_start);
      button_start.addActionListener(this);

      button_intterupt = new JButton("中断");
      panel_sub.add(button_intterupt);
      button_intterupt.addActionListener(this);

      panel_sub.add(new JLabel("state"));

      text_state = new JTextField("NEW", 10);
      panel_sub.add(text_state);
      text_state.addActionListener(this);
      text_state.setEditable(false);

      thread = new Thread(this); // 创建线程对象，目标对象是当前的对象
      button_intterupt.setEnabled(false); // 设置中断按钮为无效状态

    }

    boolean isF = true;  //中断标记

    @Override
    public void actionPerformed(ActionEvent e) {
      if (e.getSource() == button_start) {
        // isF= true; //中断标记
        boolean boo = updateSleeptime();
        if (!boo) {
          return;
        }
        thread = new Thread(this);
        thread.start();
        text_state.setText("" + thread.getState());  //在状态文本框设置线程转态
        button_start.setEnabled(false);
        button_intterupt.setEnabled(true);
      }
      if (e.getSource() == button_intterupt) {
        thread.interrupt();  //中断线程
        // thread.interrupted()  //当调用这个函数时要在run方法等几个地方设置标记
        // isF=false; //中断标记
        text_state.setText("" + thread.getState());
        button_intterupt.setEnabled(false);
        button_start.setEnabled(true);
      }
      if (e.getSource() == text_sleep) {
        updateSleeptime();
      }

    }
      
    //当在睡眠文本框时，手动输入数字大小时 ，调用的函数
    public boolean updateSleeptime() {   

      String str = text_sleep.getText();
      try {
        sleeptime = Integer.parseInt(str);
        return true;
      } catch (NumberFormatException ex) {
        JOptionPane.showMessageDialog(this, str
            + "格式错误，不能转换成整数，请重新输入！！");
        return false;
      }

    }

    @Override
    public void run() {

      while (true) {
        String str = text_word.getText();
        text_word.setText(str.substring(1) + str.substring(0, 1)); // substring(beginIndex,
                                      // endIndex)左包含，右
                                      // 不包含
        try {
          Thread.sleep(sleeptime);
        } catch (InterruptedException e) {
          break;

        }
        if (!isF) {  //中断标记
          return;
        }
      }
    }
  }

  public static void main(String[] args) {
    String texts[] = { "Welcome", "Hello", "Rollby" };
    new WelcomeJFrame(texts);

  }

}