How to skip a print statement in loop

Question

I have two classes named as Test1 and Test2.

class Test1{
    public void exe1(){
        System.out.println("Execute only one time");
        System.out.println("Execute iterations");
        System.out.println("Execute only last time");
    }
}

class Test2{
    public statuc void main(String args[]){
        Test1 ts = new Test1();
        for(int i=0 ; i<=3;i++){
            ts.exe1();
        }
    }
}

The ouput of this result would be :

Execute only one time
Execute iterations
Execute only last time
Execute only one time
Execute iterations
Execute only last time
Execute only one time
Execute iterations
Execute only last time

Is it possible in java that the output that i get should be :

Execute only one time
Execute iterations
Execute iterations
Execute iterations
Execute only last time

I mean the 1st print statement should execute at very 1st time and then number of iterations may print and at the end my last print statement should execute.

83 previous questions and you're still posting nearly-unformatted code?! Well, that shows respect for the community you're asking to help you. — T.J. Crowder
– T.J. Crowder, Commented May 12, 2015 at 8:44
You might need to pass in the current and total numbers of iterations to exe1 so that it can know whether it is the first, last or other iteration. — Andy Turner
– Andy Turner, Commented May 12, 2015 at 8:45
The code doesn't so what you claim, it executes the loop 4 times. — Andy Turner
– Andy Turner, Commented May 12, 2015 at 8:52
and in java there is nothing like "statuc" and what you have printed in output will not match your code — Keval
– Keval, Commented May 12, 2015 at 8:59

Alex Shutin · Accepted Answer · 2015-05-12 08:53:52Z

3

public void exe1(int i){
    if(i==0) System.out.println("Execute only one time");
    if(i==3) System.out.println("Execute only last time");
    else System.out.println("Execute iterations");
}

for(int i=0 ; i<=3;i++){
    ts.exe1(i);
}

Use i in your loop as a function argument.

edited May 12, 2015 at 8:53

answered May 12, 2015 at 8:46

Alex Shutin

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5 Comments

Andy Turner Over a year ago

I would pass in 3 also, so it isn't a magic number scattered through the code. Also, by the spec in the question, the first and last messages should be printed in addition, not instead of.

Little bird Over a year ago

@Alex :- Instead of taking hard coded value as 3 , if i'm taking a list.size() then how can it executed ? like for(int i=0;i==ls.size();i++) where ls is an instance arryalist and having 3 objects added to it.

Vlad Over a year ago

@Littlebird if you have list with three objects and use "for(int i=0;i==ls.size();i++)", it will be iterate 4 times and not three, you must use for(int i=0;i<ls.size();i++) see my comment stackoverflow.com/a/30186059/4580058

Alex Shutin Over a year ago

@Littlebird In this case just replace "3" with "ls.size()" in both loop initiation and conditional statement

Little bird Over a year ago

@AlexShutin: I tried it but working . I created another post can you please look into my code where i'm wrong ? stackoverflow.com/questions/30190753/…

Vlad · Accepted Answer · 2015-05-12 08:52:46Z

0

Try to use two parameters to check if the text should be printed or not

public void exe1(int counter, int totalCount){
   if (counter == 0) System.out.println("Execute only one time");
   System.out.println("Execute iterations");
   if (counter == totalCount) System.out.println("Execute only last time");
}

for(int i=0 ; i<=3;i++){
   ts.exe1(i,3);
}

answered May 12, 2015 at 8:52

Vlad

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2 Comments

Alex Shutin Over a year ago

This code will print "Execute iterations" 5 times instead of 3.

Vlad Over a year ago

only 4 times :) then you must adjust the iteration code to i<=2, while the number of iterations is 4

Keval · Accepted Answer · 2015-05-12 09:01:56Z

0

class Test1 {
public void exe1(boolean isFirst, boolean isLast) {

    if (isFirst) {
        System.out.println("Execute only one time");
    } else {
        if (isLast) {
            System.out.println("Execute only last time");
        } else {
            System.out.println("Execute iterations");
        }
    }
}
}

public class Test2 {
public static void main(String args[]) {

    Test1 ts = new Test1();

    for (int i = 0; i <= 3; i++) {

        if (i == 0) {
            ts.exe1(true, false);
        } else {

            if (i == 3) {
                ts.exe1(false, true);
            } else {
                ts.exe1(false, false);
            }
        }
    }
}
}

edited May 12, 2015 at 9:01

answered May 12, 2015 at 8:53

Keval

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1 Comment

Alex Shutin Over a year ago

The output is not right. Iterations don't execute first and last time

Azerogg · Accepted Answer · 2015-05-12 09:05:39Z

0

  class Test1{
      public void exe1(int i){
          If(i==0)
              System.out.println("Execute only one time");
          If(i>0 && i<3)
              System.out.println("Execute iterations");
          Else
              System.out.println("Execute only last time");

    }
}

By the way, next time please format your code in an adequate manner and check for mistakes. If you ran that as it is, it wouldn't compile.

answered May 12, 2015 at 9:05

Azerogg

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