Plzz tell me what is the problem here?

Question

1.00/5 (1 vote)

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i did a java program in ubuntu os......the correct and wrong ones r below....i compiled and run both of them but one is giving the right answer and the other one is giving wrong one.....
correct one:

Java

class ab{
void abc(){
int a,b;
a=10;
b=(a==3)?35:78;
System.out.println("b = "+b);
b=(a==10)?35:78;
System.out.println("b = "+b);
}
public static void main(String[] args){
ab obj=new ab();
obj.abc();
}
}

here the solution is :
b = 78
b = 35

the wrong one:

Java

class ab{
void ab(){
int a,b;
a=10;
b=(a==3)?35:78;
System.out.println("b = "+b);
b=(a==10)?35:78;
System.out.println("b = "+b);
}
public static void main(String[] args){
ab obj=new ab();

}
}

the solution is here is nothing when i run it.

What I have tried:

i tried both of them but i have no idea what's wrong here? in the first one why i m right and in the second why nothing is happened?

Posted 15-Dec-17 23:03pm

Member 13579362

Updated 16-Dec-17 1:07am

Patrice T

v4

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Comments

phil.o 16-Dec-17 5:15am

You forgot to define what is your goal, as well as what is "correct" or "wrong" in your context.
Also, a debug session could bring you some clues quite quickly.

3 solutions

Solution 2

Java

class ab{
void ab(){
int a,b;
a=10;
b=(a==3)?35:78;
System.out.println("b = "+b);
b=(a==10)?35:78;
System.out.println("b = "+b);
}
public static void main(String[] args){
ab obj=new ab(); // this will only create an object of the ab class. 

ab.ab(); // call the void method
 
}
}

See The Java™ Tutorials[^]

Posted 16-Dec-17 0:57am

Richard MacCutchan

Solution 3

I'm not familiar with Java. I'm C# guy...
Can you try this?

class ab
{
  public ab()
 {
   int a,b;
   a = 10;
   b =(a==3)? 35: 78;
   System.out.println("b = "+b);
   b = (a==10)? 35: 78;
   System.out.println("b = "+b);
 }
 public static void main(String[] args)
 {
   ab obj = new ab();
 }
}

https://docs.oracle.com/javase/tutorial/java/javaOO/constructors.html

Posted 16-Dec-17 1:07am

haiduong87

Updated 16-Dec-17 1:08am

v2

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haiduong87 · Accepted Answer · 2017-12-15T23:32:00

Solution 1

ab obj = new ab(); //the default constructor is called, not the void ab()

Posted 15-Dec-17 23:32pm

haiduong87

Comments

Member 13579362 16-Dec-17 5:42am

ok so for tht my 2nd program has not any solutions???