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Java > Learn Java > Where is the synchronized method used in java?
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Where is the synchronized method used in java?

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synchronized means that in a multi threaded environment, an object having synchronized method(s)/block(s) does not let two threads to access the synchronized method(s)/block(s) of code at the same time. This means that one thread can't read while another thread updates it. The second thread will instead...
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synchronized means that in a multi threaded environment, an object having synchronized method(s)/block(s) does not let two threads to access the synchronized method(s)/block(s) of code at the same time. This means that one thread can't read while another thread updates it. The second thread will instead wait until the first thread completes its execution. read less
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The synchronized method is used in java to lock an object for any shared resource.
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If we keep synchronized keyword in front of the method , that will allow only 1 thread at a time to execute that method. Its basically used in multi thread programming.
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When one thread is executing a synchronized method for an object, all other threads that invoke synchronized methods for the same object block until the first thread is done with the object.i.e at a time one thread can access shared variable. please refer following code example: class disp { ...
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When one thread is executing a synchronized method for an object, all other threads that invoke synchronized methods for the same object block until the first thread is done with the object.i.e at a time one thread can access shared variable. please refer following code example: class disp { void display(String nm) { System.out.print("Mr "); try{Thread.sleep(2000);}catch(Exception e){} System.out.print(nm); System.out.println(" Das"); } } class syn implements Runnable { disp ob; String s; syn(disp ob1,String s1) { ob=ob1;s=s1; Thread t=new Thread(this); t.start(); } public void run() { synchronized(ob) { ob.display(s); } } } class synmain { public static void main(String ars[]) { disp ob=new disp(); new syn(ob,"ram"); new syn(ob,"shyam"); new syn(ob,"Hari"); new syn(ob,"jadu"); new syn(ob,"Madhu"); } } read less
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