Ternary operator in java

Core java Interview Questions

• Ternary operator also known as conditional operator in java.
• Ternary operator used to evaluate boolean expression and it consists of three operands.

Ternary operator in java syntax:

1. variable x = (expression) ? value if true : value if false

• Value of x will be decided based on the condition. if condition is true then it assigns first value to the variable
• If Expression is false then it assigns second value to the variable.

Java simple example program on ternary operator / conditional operator in java

1. package operatorsinjava;
2. public class TernaryOperator {
3.  
4.     /**
5.      * @ www.instanceofjava.com
6.      * 
7.      */
8.  public static void main(String[] args) {
9.         
10.  // checking condition 2>3 and if true assign 3 else 3
11.   int x= (2>3)?3:2;
12.         
13.   System.out.println(x);
14.         
15.  // checking condition 5<4 if true assign 4 else 3
16.  int y= (5<4)?4:3;
17.         
18.  System.out.println(y);
19.  
20. }
21.  
22. }

Output:

1. 2
2. 3

Ternary operator in java for boolean:

Java simple example program on ternary operator / conditional operator for boolean

1. package operatorsinjava;
2. public class TernaryOperator {
3.  
4.     /**
5.      * @ www.instanceofjava.com
6.      * 
7.      */
8.  public static void main(String[] args) {
9.         
10.  
11.  boolean x= true ? true: false;
12.         
13.  System.out.println(x);
14.         
15.  boolean y= false ? true : false;
16.             
17.  System.out.println(y);
18.         
19.  boolean z= false ? false : true;
20.         
21.  System.out.println(z);
22.  
23. }
24.  
25. }

Output:

1. true
2. false
3. true

Ternary operator in java for Strings:

Java simple example program on ternary operator / conditional operator for String

1. package operatorsinjava;
2. public class TernaryOperatorForStrings{
3.  
4.     /**
5.      * @ www.instanceofjava.com
6.      * 
7.      */
8. public static void main(String[] args) {
9.         
10.  String str= "java".equals("java") ? "Java Questions" : "Java Programs";
11.         
12.  System.out.println(str);
13.         
14.  String str1= (1==3)? "its true" : "its false";
15.         
16.  System.out.println(str1);
17.        
18. }
19.  
20. }

Output:

1. Java Questions
2. its false

Ternary operator in java for null;

Java simple example program on ternary operator / conditional operator for null check

1. package operatorsinjava;
2. public class TernaryOperatorForStrings{
3.  
4.     /**
5.      * @ www.instanceofjava.com
6.      * 
7.      */
8. public static void main(String[] args) {
9.         
10. String str= null;
11.  
12. String str1= (str==null) ? "its true" : "its false";
13.  
14. System.out.println(str1);
15.         
16. String str2= (str1!=null) ? "its true" : "its false";
17.  
18. System.out.println(str2);
19. 
    
20. }
21.  
22. }

Output:

1. its true
2. its true

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Ternary operator in java

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