Thread: Beginner: Passing Objects to Methods

Hello everyone,

The names free_spirit and am a new registered user on this site. I am also a new programmer to the Java language. There is a problem in a book I am learning from, Introduction to Java Programming and Data Structures by Daniel Liang (11th edition), that I'm having trouble with.

public class Test {
    public static void main(String[] args) {
       Count myCount = new Count();
       int times = 0;
 
       for (int i = 0; i < 100; i++)
          increment(myCount, times);
 
       System.out.println("count is " + myCount.count);
       System.out.println("times is " + times);
     }
 
     public static void increment(Count c, int times) {
        c.count++;
        times++;
     }
  }
 
 class Count {
      public int count;
 
       public Count(int c) {
          count = c;
       }
 
       public Count() {
          count = 1;
        }
  }

The output is:

count 101
times 0.

I understand why the output for test is zero but not so much for count. It would be helpful if anyone can explain. Thank you!

Please wrap posted code in code tags. I did it this time.

The output is:

Please copy the contents of the output and paste it here so we can see exactly what was printed. The posted code would not print what was shown.

output for test is zero but not so much for count

The value of count was saved in the object. The value was changed in the increment method via the object that was passed to it.

The output is

count is 101
times is 0

When you say the value of count was saved in the object, is it the value 1 in the no args Count constructor or the other constructor?




LOL never mind , I finally understood what you said. Thank you Norm.