Thread All Methods

class ChopStick{

boolean available;

ChopStick(){

available=true;
}

public synchronized void takeup(){

while(!available){
try
{
System.out.println("Hello is waiting for the other chopStick");
wait();
}
catch(InterruptedException e){}
}
available=false;
}

public synchronized void putdown(){

available=true;
notify();
}
}


class Hello extends Thread{

ChopStick left,right;

int hello_num;

Hello(int num,ChopStick chop1,ChopStick chop2){

hello_num=num;
left=chop1;
right=chop2;
}

public void eat(){

left.takeup();
right.takeup();
System.out.println("Hello "+(hello_num+1)+" is eating");
}

public void think(){

left.putdown();
right.putdown();

System.out.println("Hello "+(hello_num+1)+" is THinking");
}

public void run(){

while(true){

eat();
try
{
sleep(1000);
}
catch(InterruptedException ex){}

think();

try
{
sleep(1000);
}
catch(InterruptedException ex){}

}
}
}




class ThreadAllDemo{

static ChopStick[] chopsticks=new ChopStick[5];
static Hello[] hellos=new Hello[5];

public static void main(String a[]){

for(int count=0;count<=4;count++){

chopsticks[count]=new ChopStick();
}

for(int count=0;count<=4;count++){

hellos[count]=new Hello(count,chopsticks[count],chopsticks[(count+1)%5]);
}


for(int count=0;count<=4;count++){

hellos[count].start();
}
}
}