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// : c13:ThreadVariations.java
// Creating threads with inner classes.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// Using a named inner class:
class InnerThread1 {
private int countDown = 5;
private Inner inner;
private class Inner extends Thread {
Inner(String name) {
super(name);
start();
}
public void run() {
while (true) {
System.out.println(this);
if (--countDown == 0)
return;
try {
sleep(10);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
}
public String toString() {
return getName() + ": " + countDown;
}
}
public InnerThread1(String name) {
inner = new Inner(name);
}
}
// Using an anonymous inner class:
class InnerThread2 {
private int countDown = 5;
private Thread t;
public InnerThread2(String name) {
t = new Thread(name) {
public void run() {
while (true) {
System.out.println(this);
if (--countDown == 0)
return;
try {
sleep(10);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
}
public String toString() {
return getName() + ": " + countDown;
}
};
t.start();
}
}
// Using a named Runnable implementation:
class InnerRunnable1 {
private int countDown = 5;
private Inner inner;
private class Inner implements Runnable {
Thread t;
Inner(String name) {
t = new Thread(this, name);
t.start();
}
public void run() {
while (true) {
System.out.println(this);
if (--countDown == 0)
return;
try {
Thread.sleep(10);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
}
public String toString() {
return t.getName() + ": " + countDown;
}
}
public InnerRunnable1(String name) {
inner = new Inner(name);
}
}
// Using an anonymous Runnable implementation:
class InnerRunnable2 {
private int countDown = 5;
private Thread t;
public InnerRunnable2(String name) {
t = new Thread(new Runnable() {
public void run() {
while (true) {
System.out.println(this);
if (--countDown == 0)
return;
try {
Thread.sleep(10);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
}
public String toString() {
return Thread.currentThread().getName() + ": " + countDown;
}
}, name);
t.start();
}
}
// A separate method to run some code as a thread:
class ThreadMethod {
private int countDown = 5;
private Thread t;
private String name;
public ThreadMethod(String name) {
this.name = name;
}
public void runThread() {
if (t == null) {
t = new Thread(name) {
public void run() {
while (true) {
System.out.println(this);
if (--countDown == 0)
return;
try {
sleep(10);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
}
public String toString() {
return getName() + ": " + countDown;
}
};
t.start();
}
}
}
public class ThreadVariations {
public static void main(String[] args) {
new InnerThread1("InnerThread1");
new InnerThread2("InnerThread2");
new InnerRunnable1("InnerRunnable1");
new InnerRunnable2("InnerRunnable2");
new ThreadMethod("ThreadMethod").runThread();
}
} ///:~
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