setting a variable with a random number

[Jeff Ciaccio]

I am trying to set variable "addr" to some random int, but I cannot seem to pass the random int in. Can anybody help me?

import java.util.Random;

class Ttest1 {
	public static void main(String argv[]) {
		System.out.println("Howdy");
		String cpu[] = new String[8];

		for (int i = 0; i < cpu.length; i++){
		cpu[i] = "cpu" + i; //this just creates the variable names cpu0, cpu1, etc.
		System.out.println(cpu[i] + " Created from Ttest1");
		} //next i 
		cpu cpu0 = new cpu();  //this creates a new object 
		cpu cpu1 = new cpu();  //this creates a new object 
		cpu cpu2 = new cpu();  //this creates a new object 
		cpu cpu3 = new cpu();  //this creates a new object 		
		cpu cpu4 = new cpu();  //this creates a new object 		
		cpu cpu5 = new cpu();  //this creates a new object 		
		cpu cpu6 = new cpu();  //this creates a new object 		
		cpu cpu7 = new cpu();  //this creates a new object 		

      cpu0.echoName();
	}
}

public class cpu extends Thread {
	cpu() { //constructor - executed when thread is created with new
	   start(); // by default calls method "run"
	}
   private int addr;
   private Random randNum;
   private int newAddr;
	public void run() {
		System.out.println("Howdy from the thread");
	}
	public void echoName() {
		System.out.println(this.getName());
	}

   public int getAddr() {
      addr = randNum.nextInt(32); 
      return addr;
   }

   public void setAddr(int randNum.nextInt(32)) {
      this.addr = randNum.nextInt(32);
   }

   }

   
   
}

    

[Henry Wong]

public void setAddr(int randNum.nextInt(32)) {   
      this.addr = randNum.nextInt(32);   
}   

This isn't valid Java. In a method declaration, the parameters are type and name of params -- you can't put method calls there.

Henry

[Gavin Tranter]

Well first off, you are trying to execute a statement in a parameter:

int randNum.nextInt(32)

This ising really going to work, firstly i could be wrong but its an illegal statement and secondly, even if it was legal randNum hasnt been initiallised:

private Random randNum; 

So given that what do you think would help you to solve your problem?

[Fred Hamilton]

It's not clear to me how your setAddr and getAddr methods are being called.

However, if setAddr method just sets the value of the instance variable addr, then presumably getAddr is going to return the value of your instance variable to some other method or class. So shouldn't your getAddr() method just return addr, and not actually set its value a second time?

p.s. ok two people got in ahead of me as I was typing my note.

[Jesper de Jong]

Your main() method contains some strange things. For example, the following lines of code:

String cpu[] = new String[8];  

for (int i = 0; i < cpu.length; i++){  
  cpu[i] = "cpu" + i; //this just creates the variable names cpu0, cpu1, etc.  
  System.out.println(cpu[i] + " Created from Ttest1");  
} //next i   

What do you think this code does, why have you included it? It does not "create variable names cpu0, cpu1, etc." as the comment says.