java tutorial - Java thread join - java programming - learn java - java basics - java for beginners
Learn Java - Java tutorial - Java thread join - Java examples - Java programs
The join() method
- The join() methods waits until the thread will die.
- In other word, it will cause the presently running threads to end its executing until the thread joins to complete its task.
Syntax:
public void join()throws InterruptedException
public void join(long milliseconds)throws InterruptedExceptionclick below button to copy the code. By - java tutorial - team
join() method
public class JoinMethod extends Thread{
public void run(){
for(int i=0;i<=4;i++){
try{
Thread.sleep(100);
}catch(Exception e){System.out.println(e);}
System.out.println(i);
}
}
public static void main(String args[]){
JoinMethod time1=new JoinMethod();
JoinMethod time2=new JoinMethod();
JoinMethod time3=new JoinMethod();
time1.start();
try{
time1.join();
}catch(Exception e){System.out.println(e);}
time2.start();
time3.start();
}
}click below button to copy the code. By - java tutorial - team
Output
0
1
2
3
4
0
0
1
1
2
2
3
3
4
4- When time1 is completes its task then time2 and time3 starts executing.
join(long miliseconds) method
public class JoinMethod extends Thread{
public void run(){
for(int i=2;i<=7;i++){
try{
Thread.sleep(700);
}catch(Exception e){System.out.println(e);}
System.out.println(i);
}
}
public static void main(String args[]){
JoinMethod time1=new JoinMethod();
JoinMethod time2=new JoinMethod();
JoinMethod time3=new JoinMethod();
time1.start();
try{
time1.join(1700);
}catch(Exception e){System.out.println(e);}
time2.start();
time3.start();
}
} click below button to copy the code. By - java tutorial - team
Output
2
3
4
2
2
5
3
3
6
4
4
7
5
5
6
6
7
7- When time1 is completes its task for 1700 milliseconds (3 times) then time2 and time3 starts executing.
getName(),setName(String) and getId() method:
public String getName()
public void setName(String name)
public long getId()click below button to copy the code. By - java tutorial - team
public class JoinMethod extends Thread{
public void run(){
System.out.println("running...");
}
public static void main(String args[]){
JoinMethod time1=new JoinMethod();
JoinMethod time2=new JoinMethod();
System.out.println("Name of t1:"+time1.getName());
System.out.println("Name of t2:"+time2.getName());
System.out.println("id of t1:"+time1.getId());
time1.start();
time2.start();
time1.setName("Welcome to wikitechy");
System.out.println("After changing name of t1:"+time1.getName());
}
} click below button to copy the code. By - java tutorial - team
Name of t1:Thread-0
Name of t2:Thread-1
id of t1:21
After changing name of t1:Welcome to wikitechy
running...
running...The currentThread() method:
- These method returns a reference to the currently executing thread object.
Syntax:
public static Thread currentThread()click below button to copy the code. By - java tutorial - team
currentThread() method
public class JoinMethod extends Thread{
public void run(){
System.out.println(Thread.currentThread().getName());
}
public static void main(String args[]){
JoinMethod time1=new JoinMethod();
JoinMethod time2=new JoinMethod();
time1.start();
time2.start();
}
} click below button to copy the code. By - java tutorial - team
Output
Thread-0
Thread-1