Categories
Other Categories

Java Ternary Operator – JournalDev

Java ternary operator is the only conditional operator that takes three operands. Java ternary operator is a one liner replacement for if-then-else statement and used a lot in java programming. We can use ternary operator to replace switch also as shown in below example.

Java Ternary Operator


The first operand in java ternary operator should be a boolean or a statement with boolean result. If the first operand is true then java ternary operator returns second operand else it returns third operand.

Syntax of java ternary operator is:

result = testStatement ? value1 : value2;

If testStatement is true then value1 is assigned to result variable else value2 is assigned to result variable.

Let’s see java ternary operator example in a simple java program.


package com.journaldev.util;
 
public class TernaryOperator {
 
    public static void main(String[] args) {
         
        System.out.println(getMinValue(4,10));
         
        System.out.println(getAbsoluteValue(-10));
         
        System.out.println(invertBoolean(true));
         
        String str = "Australia";
        String data = str.contains("A") ? "Str contains 'A'" : "Str doesn't contains 'A'";
        System.out.println(data);
        
        int i = 10;
        switch (i){
        case 5: 
        	System.out.println("i=5");
        	break;
        case 10:
        	System.out.println("i=10");
        	break;
        default:
        	System.out.println("i is not equal to 5 or 10");
        }
        
        System.out.println((i==5) ? "i=5":((i==10) ? "i=10":"i is not equal to 5 or 10"));
    }
 
    private static boolean invertBoolean(boolean b) {
        return b ? false:true;
    }
 
    private static int getAbsoluteValue(int i) {
        return i<0 ? -i:i;
    }
 
    private static int getMinValue(int i, int j) {
        return (i<j) ? i : j;
    }
 
}

Output of the above ternary operator java program is:


4
10
false
Str contains 'A'
i=10
i=10

As you can see that we are using java ternary operator to avoid if-then-else and switch case statements. This way we are reducing the number of lines of code in java program. That’s all for a quick roundup of ternary operator in java.

Leave a Reply

Your email address will not be published. Required fields are marked *