public class SamThread extends Thread{//1

public void run(){

int count=1;

while(true){

System.out.println(count+++" hello");

}

}

public static void main(String[] args) {//mian w w

WhiteBoard wb=new WhiteBoard();

Teacher t=new Teacher(wb);

Student sam=new Student("samihan", wb);

Student ved=new Student("vedant", wb);

Student vrd=new Student("varad", wb);

t.start();

sam.start();

ved.start();

vrd.start();

}

}

class WhiteBoard{

int noOfStudents=0;

int count=0;

String text;

// boolean flag=true;

synchronized public void set(String args) {

while(count!=0)try{wait();}catch(Exception e){}

System.out.println("bagha poranno hmmm");

text=args;

count=noOfStudents;

notifyAll();

}

synchronized public String get() {

while(count==0)try{wait();}catch(Exception e){}

count--;

if(count==0)notify();

notifyAll();

return text;

}

public void attendence() {

noOfStudents++;

}

}

class Student extends Thread{

String name;

WhiteBoard wb;

public Student(String name,WhiteBoard wb){

this.name=name;

this.wb=wb;

}

public void run(){

String str;

do{

str=wb.get();

System.out.println(name+" "+str);

System.out.flush();

}while(!str.equals("end"));

}

}

class Teacher extends Thread{

WhiteBoard wb;

String notes[]={"java","DSA","android","web","end"};

public Teacher(WhiteBoard wb){

this.wb=wb;

}

public void run(){

for(String x:notes){

wb.set(x);

}

}

}

class ATM{

synchronized public void checkBalance(Customer c){

System.out.println(c.amount);

}

synchronized public void withdraw(Customer c,int havet){

if(c.amount>=havet)System.out.println(havet);

else System.out.println(0);

}

}

class Customer extends Thread{

ATM atm;

String name;

int amount;

int havet;

public Customer(ATM atm,String name,int amount){

this.atm=atm;

this.name=name;

this.amount=amount;

}

public void useAtm(int havet) {

this.havet=havet;

run();

}

public void run(){

atm.checkBalance(this);

atm.withdraw(this, havet);

}

}

class myc extends Thread{

public void run(){

int count=1;

while(true){

System.out.println(count+++" world");

}

}

}