为什么当条件= false时while循环不退出

Question

I've got a loop running and when it reaches the the else statement it should stop running. When I debug the boolean power does update but it still enters the loop. I know I could use System.Exit(0); or a break; but I would understand the logic behind why it would keep running with false conditions?

public class Mmu {      
    //code omitted
    public static final Mmu MMU = new Mmu();

    public static void main(String[] args) {
        MMU.runProcesses();
        //code omitted
    }
        private Mmu() {
            //code omitted 
        }
    protected void runProcesses(){
        boolean power= false; // running processes,  normally this would start as false but I changed to test
        boolean twoFinished = false;
        boolean oneFinished = false;
        while (power = true) { //still entering this when power = false why
            twoFinished = MMU.processTwo.finished();
            oneFinished = MMU.processOne.finished();
            if (oneFinished = false) {
                MMU.processOne.thread();
            } else if (twoFinished = false) {
                MMU.processTwo.thread();
            } else {
                power = false;
                System.out.println("All processes Finished");
                //System.exit(0);
            }
        }   
    }
}

Thanks for any advice in advance.

Answer 1

while (power = true) 

Is always true since you're assigning and not comparing.

Write:

while(power) 

instead.

---

The expression of the assignment returns the assigned value.

That's why we don't like to use == when we compare boolean s, it might lead to this kind of mistakes. You can simply write if(someBoolean) instead of if(someBoolean == true) .

Answer 2

while (power = true) here your are using assigning operator and assigning power = true again. Use while(power)