My daily question(Threading)

[Army]

public class EHU3 extends Thread {
    int n;
    int object1;
    int object2;
    public EHU3(int n){
        this.n = n;
    }
 
    public void run(){
        for(int i = 0; i <= 30; i++){
            System.out.println("Thread " + n + " starting.");
            System.out.println(i);
            System.out.println("Thread " + n + " finished. Sleeping now...");
            try {
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				
				System.out.println("Thread " + n + "was not finished.");
			}
        }
    }
    public EHU3(int a, int b){
    	this.object1 = a;
    	this.object2 = b;
    }
    public void run(int a, int b){
    	try{
    		System.out.println("A plus B: " + a + b);
    		System.out.printf("A minus B: " , a - b);
    		System.out.println("A divided by B: " + a/b);
    		System.out.println("A times B: " + a*b);
    		Thread.sleep(2000);
    		
    	}catch(InterruptedException e){
    		System.out.println("Thread" + a + "was not finished");
    		System.out.println("Thread" + b + "was not finished");
    	}
    }
    public static void main(String [] args){
    	Thread t = new Thread();
    	new EHU3(95, 23).start();
        new EHU3(1).start();
        new EHU3(2).start();
        new EHU3(3).start();
        
    }
}

I initially wanted to do it where it would go from 1 - 30, with 3 threads, then when it finished add ab and such.... But all it has done is create another thread named 0. I don't even have a thread 0 on there, so I have no idea what happened. this is what I get:
[spoiler]Thread 0 starting.
0
Thread 0 finished. Sleeping now...
Thread 1 starting.
0
Thread 1 finished. Sleeping now...
Thread 2 starting.
0
Thread 2 finished. Sleeping now...
Thread 3 starting.
0
Thread 3 finished. Sleeping now...
ETC...

There is obviously no addition or sub, or mult, or division in there... wtf is up?

[Tolls]

Yes you do.
Look at the EHU3 constructor that takes two arguments.
For the Thread you create via that constructor, what will the value of 'n' be?

[Army]

Yes you do.
Look at the EHU3 constructor that takes two arguments.
For the Thread you create via that constructor, what will the value of 'n' be?

Did I not overload the classes properly (not sure if overloading is the correct term since there is so much lingo in Java)? I just made the same things, but set it with different arguments...

And is that like a trick question or something...?

[Tolls]

        new EHU3(95, 23).start();

This line here creates an EHU3 object using this constructor:

    public EHU3(int a, int b){
         this.object1 = a;
         this.object2 = b;
     }

In which you don't set 'n'.
Consequently 'n' for this object has the default value of 0.
It wasn't supposed to be a trick question.

[Army]

        new EHU3(95, 23).start();

This line here creates an EHU3 object using this constructor:

    public EHU3(int a, int b){
         this.object1 = a;
         this.object2 = b;
     }

In which you don't set 'n'.
Consequently 'n' for this object has the default value of 0.
It wasn't supposed to be a trick question.

Would it not be impossible for me to create the parameter 'n' since there are two arguments for the method?

[JosAH]

What is supposed to call the run( ... ) method that has two parameters?

kind regards,

Jos

[brynpttrsn]

Would it not be impossible for me to create the parameter 'n' since there are two arguments for the method?

In order for n to be set to a value that is not 0, you must call your constructor that sets n:

public EHU3(int n){
    this.n = n;
}

When you create your first thread you call the constructor that sets a and b, but leaves n at 0.
If you wish to set n in the same constructor you would only have to add another parameter to set n as well as a and b.

with 3 threads

In your main function you are creating 4 separate threads. Keep in mind that if you create "new" threads, all of their variables are separate from each other. The values of a and b are not set in the last three threads created.

new EHU3(95, 23).start();

this line creates a new thread where:
a = 95
b = 23
and since n is not set its default value is 0

 new EHU3(1).start();

this line creates a new thread where:
a and b are not set so their default values are 0
n = 1

These are 2 completely different instances of EHU3 that have their own values for each variable.

Also note that:

int object1;
int object2;
Thread t = new Thread();

These variables are currently unused.
Also:
(as JosAH is pointing out)
The way that a thread works does not allow you to overload the run method with additional parameters.
If you wish to use this method:

public void run(int a, int b)

you must call it from elsewhere in the code because it is not executed with the call to start().

[Army]

I guess you don't understand what I'm trying to do. Also I'm guessing that the code that I have only works for for loops because nothing is working. All I want this code

 public EHU3(int n, int a, int b){
    	this.n = n;
    }
    public void run(int n, int n1){
    	System.out.println("A plus B: " + n + n1);
    	System.out.printf("A minus B: " , n - n1);
    	System.out.println("A divided by B: " + n/n1);
    	System.out.println("A times B: " + n*n1);
    	try{
    		
    		Thread.sleep(2000);
    		
    	}catch(InterruptedException e){
    		System.out.println("Thread was not terminated.");
    	}
    }

Is to just add, subtract, multiply, divide, a and b. And do it in intervals of 2000.