49 lines
890 B
Java
49 lines
890 B
Java
// concurrency/SyncObject.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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// Synchronizing on another object.
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class DualSynch {
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private Object syncObject = new Object();
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public synchronized void f() {
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for(int i = 0; i < 5; i++) {
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System.out.println("f()");
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Thread.yield();
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}
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}
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public void g() {
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synchronized(syncObject) {
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for(int i = 0; i < 5; i++) {
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System.out.println("g()");
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Thread.yield();
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}
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}
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}
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}
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public class SyncObject {
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public static void main(String[] args) {
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final DualSynch ds = new DualSynch();
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new Thread() {
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@Override
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public void run() {
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ds.f();
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}
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}.start();
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ds.g();
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}
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}
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/* Output:
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f()
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g()
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g()
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f()
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g()
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f()
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g()
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f()
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f()
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g()
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*/
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