How to use java conditional operators

Concept

1. The conditional operator is also called the ternary operator. This operator has three operands and needs to determine the value of a Boolean expression.

2. This operator mainly determines which value should be given to the variable.

Grammar form

布尔表达式 ？ 表达式1 ：表达式2

Operation process

If the value of the Boolean expression is true, the expression is returned The value of expression 1, otherwise the value of expression 2 is returned.

public static void main(String[] args) {
    int a, b;
    a = 10;
    // 如果 a 等于 1 成立，则设置 b 为 20，否则为 30
    b = (a == 1) ? 20 : 30;
    System.out.println("Value of b is : " + b);
 
    // 如果 a 等于 10 成立，则设置 b 为 20，否则为 30
    b = (a == 10) ? 20 : 30;
    System.out.println("Value of b is : " + b);
}

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