package?randomcharacter;
import?java.awt.*;
import?java.awt.event.*;
import?javax.swing.*;
public?class?RandomCharacter?extends?Japplet?implements?ActionListener{
????private?String?allchars?=?“ABCDEFGHIJKLMNOPQRSTUVWXYZ“;
????private?final?static?int?SIZE?=?3;
????private?JLabel?[]outputs;
????private?JCheckBox?[]checkBoxes;
????private?Thread?[]threads;
????private?boolean?[]suspended;
????static?int?count?=?0;

????public?void?init（）{
????????outputs?=?new?JLabel[SIZE];
????????checkBoxes?=?new?JCheckBox[SIZE];
????????threads?=?new?Thread[SIZE];
????????suspended?=?new?boolean[SIZE];
????????Container?container?=?getContentPane（）;
????????container.setLayout（new?GridLayout（SIZE255））;

????????for（int?count?=?0;count????????????outputs[count]?=?new?JLabel（）;
????????????outputs[count].setBackground（Color.GREEN）;
????????????outputs[count].setOpaque（true）;
????????????container.add（outputs[count]）;
????????????checkBoxes[count]?=?new?JCheckBox（“線程掛起“）;
????????????checkBoxes[count].addActionListener（this）;
????????????container.add（checkBoxes[count]）;
????????}
????}

????public?void?start（）{
????????for（int?count?=?0;count????????????threads[count]?=?new?Thread（new?Runnableobject（）“線程“+（count+1））;
????????????threads[count].start（）;
????????}
????}

????private?int?getIndex（Thread?current）{
????????for（int?count?=?0;count????????????if（current?==?threads[count]）{
????????????????return?count;
????????????}
????????}
????????return?-1;
????}

????public?synchronized?void?stop（）{
????????for（int?count?=?0;count????????????threads[count]?=?null;
????????}
????????notifyAll（）;
????}

????public?synchronized?void?actionPerformed（ActionEvent?event）{
????????for（int?count?=?0;count????????????if（event.getSource（）==checkBoxes[count]）{
????????????????suspended[count]?=!suspended[count];
????????????????outputs[count].setBackground（suspended[count]?Color.MAGENTA:Color.GREEN）;
????????????????if（!suspended[count]）{
????????????????????notifyAll（）;
????????????????}
????????????????return;
????????????}
????????}
????}

????private?class?Runnableobject?implements?Runnable{
????????public?void?run（）{
????????????final?Thread?currentThread?=?Thread.currentThread（）;
????????????final?int?index?=?getIndex（currentThread）;
????????????System.err.println（“index=“+index+“thread=“+currentThread.getName（））;
????????????while?（threads[index]?==?currentThread）{
????????????????try{
????????????????????Thread.sleep（（int）（Math.random（）*1000））;
????????????????????synchronized?（RandomCharacter.this）{
????????????????????????while（suspended[index]&&threads[index]==currentThread）{
????????????????????????????RandomCharacter.this.wait（）;
????????????????????????}
????????????????????}
????????????????}
????????????????catch?（InterruptedException?e）{
????????????????????e.printStackTrace（）;
????????????????}

????????????????SwingUtilities.invokeL

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????16763??2018-06-22?17:00??11.8（2）\20180622170012.png
?????文件????????1546??2018-06-22?16:41??11.8（2）\RandomCharacter$Runnableobject$1.class
?????文件????????2262??2018-06-22?16:41??11.8（2）\RandomCharacter$Runnableobject.class
?????文件????????3543??2018-06-22?16:41??11.8（2）\RandomCharacter.class
?????文件????????3430??2018-05-28?21:14??11.8（2）\RandomCharacter.java
?????文件???????32768??2018-06-22?17:01??11.8（2）\Thumbs.db
?????文件?????????141??2018-06-22?16:41??11.8（2）\java.policy.applet
?????目錄???????????0??2018-09-28?14:30??11.8（2）\