Mega Code Archive
Thread synchronization
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public class TwoObjects extends Object {
private String objID;
public TwoObjects(String objID) {
this.objID = objID;
}
public synchronized void synchronizedMethod(int val) {
print("entering synchronized method()");
int num = val * 2 + objID.length();
print("in doStuff() - local variable num=" + num);
try {
Thread.sleep(2000);
} catch (InterruptedException x) {
}
print("leaving synchronized method");
}
public void print(String msg) {
threadPrint("objID=" + objID + " - " + msg);
}
public static void threadPrint(String msg) {
String threadName = Thread.currentThread().getName();
System.out.println(threadName + ": " + msg);
}
public static void main(String[] args) {
final TwoObjects obj1 = new TwoObjects("obj1");
final TwoObjects obj2 = new TwoObjects("obj2");
Runnable runA = new Runnable() {
public void run() {
obj1.synchronizedMethod(3);
}
};
Thread threadA = new Thread(runA, "threadA");
threadA.start();
try {
Thread.sleep(200);
} catch (InterruptedException x) {
}
Runnable runB = new Runnable() {
public void run() {
obj2.synchronizedMethod(7);
}
};
Thread threadB = new Thread(runB, "threadB");
threadB.start();
}
}
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