yield(),Join(),Sleep(),InterruptedException,Thread Priorities,Synchronization in Java,setPriority(),run(),currentThread().getName()

1. Programs on multithreading
yield()
package package2;
classMyThread extendsThread
{
publicvoidrun()
{
for(inti=1;i<=10;i++)
{
Thread.yield(); //thisthreadpausesandgivesachance to mainthreadto execute
System.out.println("child");
}
}
}
publicclassThreadDemo
{
publicstaticvoidmain(Stringargs[])
{
MyThread ob= newMyThread();
ob.start();
for(inti=1;i<=10;i++)
{
System.out.println("main");
}
}
}
Join()
package package2;
classMyThread2 extendsThread
{
publicvoidrun()
{
for(inti=1;i<=10;i++)
{
System.out.println("child2");
}
}
}
publicclassThreadDemo1{
publicstaticvoidmain(String[] args) throwsInterruptedException
{
// TODO Auto-generatedmethodstub

2. MyThread2 ob = newMyThread2();
ob.start();
for(inti=1;i<=10;i++)
{
ob.join(); //here mainthreadwaitsuntil childcontinues
System.out.println("main1");
}
}
}
Sleep()
package package2;
publicclass ThreadDemo6{
publicstaticvoidmain(String[] args) throws InterruptedException
{
// TODO Auto-generatedmethodstub
for(inti=0;i<=10;i++)
{
System.out.println("Slide -"+i);
Thread.sleep(5000);
}
}
}
package package2;
classMyThread3 extendsThread
{
publicvoidrun()ThreadPriorities
{
for(inti=1;i<=5;i++)
{
System.out.println("Name of thread="+Thread.currentThread().getName()+"number="+i);
}
}
}
classMyThread4 extendsThread
{
publicvoidrun()
{
for(inti=1;i<=5;i++)

3. {
System.out.println("Name of thread="+Thread.currentThread().getName()+"number="+i);
}
}
}
publicclassThreadPriorities
{
publicstaticvoidmain(String[] args)
{
// TODO Auto-generatedmethodstub
MyThread3 ob1 = newMyThread3();
ob1.setPriority(1);
ob1.start();
MyThread4 ob2 = newMyThread4();
ob2.setPriority(10);
ob2.start();
}
}
Synchronizationin Java
Synchronizationinjavaisthe capabilitytocontrol the accessof multiple threadstoanysharedresource.
Java Synchronizationisbetteroptionwhere we wanttoallow onlyone threadtoaccess the shared
resource.
The synchronizationismainlyusedto
 To preventthreadinterference.
 To preventconsistencyproblem.
There are twotypesof synchronization
 ProcessSynchronization
 ThreadSynchronization
Here,we will discussonlythreadsynchronization. Below isanexample of synchronizedmethoddisplay()
Example:
package package2;
classStu
{
publicsynchronizedvoiddisplay()
{
for(inti=0;i<10;i++)
System.out.println("Name of thread"+Thread.currentThread().getName());
}
}
classMyThread5 extendsThread
{
Stu ob;
MyThread5(Stuob)
{
this.ob=ob;
}

4. publicvoidrun()
{
ob.display();
}
}
publicclassThreadDemo4
{
publicstaticvoidmain(Stringargs[])
{
Stu ob= newStu();
MyThread5 t1 = newMyThread5(ob);
t1.start();
MyThread5 t2 = newMyThread5(ob);
t2.start();
MyThread5 t3 = newMyThread5(ob);
t3.start();
}
}
All the 3 threadsare accessingthe display() andsince we have made display() assynchronized.If one
threadis runningdisplay() method,all otherthreadswill wait.
yield(),Join(),Sleep(),InterruptedException,ThreadPriorities,Synchronizationin
Java,setPriority(),run(),currentThread().getName()