public class SimpleThreads { //Display a message, preceded by the name of the current thread
static void threadMessage(String message) {
String threadName = Thread.currentThread().getName();
System.out.format("%s: %s%n", threadName, message);
} private static class MessageLoop implements Runnable {
public void run() {
String importantInfo[] = {
"Mares eat oats",
"Does eat oats",
"Little lambs eat ivy",
"A kid will eat ivy too"
};
try {
for (int i = 0; i < importantInfo.length; i++) {
//Pause for 4 seconds
Thread.sleep(4000);
//Print a message
threadMessage(importantInfo[i]);
}
} catch (InterruptedException e) {
threadMessage("I wasn't done!");
}
}
} public static void main(String args[]) throws InterruptedException {
//Delay, in milliseconds before we interrupt MessageLoop
//thread (default one hour).
long patience = 1000 * 60 * 60; //If command line argument present, gives patience in seconds.
if (args.length > 0) {
try {
patience = Long.parseLong(args[0]) * 1000;
} catch (NumberFormatException e) {
System.err.println("Argument must be an integer.");
System.exit(1);
} } threadMessage("Starting MessageLoop thread");
long startTime = System.currentTimeMillis();
Thread t = new Thread(new MessageLoop());
t.start(); threadMessage("Waiting for MessageLoop thread to finish");
//loop until MessageLoop thread exits
while (t.isAlive()) {
threadMessage("Still waiting...");
//Wait maximum of 1 second for MessageLoop thread to
//finish.
t.join(1000);
if (((System.currentTimeMillis() - startTime) > patience) &&
t.isAlive()) {
threadMessage("Tired of waiting!");
t.interrupt();
//Shouldn't be long now -- wait indefinitely
t.join();
} }
threadMessage("Finally!");
}
}
1,这就一个文件可编译后怎么出来三个class呀???
而它只有一个内部类。
2,此段程序中如何在运行时通过String [] args来输入信息???
3,此段程序中怎么来体现中方法interrupt的调用???
4,
static void threadMessage(String message) {
String threadName = Thread.currentThread().getName();
System.out.format("%s: %s%n", threadName, message);
} private static class MessageLoop implements Runnable {
public void run() {
String importantInfo[] = {
"Mares eat oats",
"Does eat oats",
"Little lambs eat ivy",
"A kid will eat ivy too"
};
try {
for (int i = 0; i < importantInfo.length; i++) {
//Pause for 4 seconds
Thread.sleep(4000);
//Print a message
threadMessage(importantInfo[i]);
}
} catch (InterruptedException e) {
threadMessage("I wasn't done!");
}
}
} public static void main(String args[]) throws InterruptedException {
//Delay, in milliseconds before we interrupt MessageLoop
//thread (default one hour).
long patience = 1000 * 60 * 60; //If command line argument present, gives patience in seconds.
if (args.length > 0) {
try {
patience = Long.parseLong(args[0]) * 1000;
} catch (NumberFormatException e) {
System.err.println("Argument must be an integer.");
System.exit(1);
} } threadMessage("Starting MessageLoop thread");
long startTime = System.currentTimeMillis();
Thread t = new Thread(new MessageLoop());
t.start(); threadMessage("Waiting for MessageLoop thread to finish");
//loop until MessageLoop thread exits
while (t.isAlive()) {
threadMessage("Still waiting...");
//Wait maximum of 1 second for MessageLoop thread to
//finish.
t.join(1000);
if (((System.currentTimeMillis() - startTime) > patience) &&
t.isAlive()) {
threadMessage("Tired of waiting!");
t.interrupt();
//Shouldn't be long now -- wait indefinitely
t.join();
} }
threadMessage("Finally!");
}
}
1,这就一个文件可编译后怎么出来三个class呀???
而它只有一个内部类。
2,此段程序中如何在运行时通过String [] args来输入信息???
3,此段程序中怎么来体现中方法interrupt的调用???
4,
第二个问题:
String[] args实际上就是你运行程序时输入的参数
3.interrupt()使程序跳出for循环进入catch块