Java 程序：检查三个布尔变量中有两个是否为 true

示例：检查三个布尔变量中有两个为真

// Java Program to check if 2 variables
// among the 3 variables are true

import java.util.Scanner;

class Main {
  public static void main(String[] args) {
    
    // create 3 boolean variables
    boolean first;
    boolean second;
    boolean third;
    boolean result;

    // get boolean input from the user
    Scanner input = new Scanner(System.in);
    System.out.print("Enter first boolean value: ");
    first = input.nextBoolean();

    System.out.print("Enter second boolean value: ");
    second = input.nextBoolean();

    System.out.print("Enter third boolean value: ");
    third = input.nextBoolean();

    // check if two are true
    if(first) {

      // if first is true
      // and one of the second and third is true
      // result will be true
      result = second || third;
    }
    else {

      // if first is false
      // both the second and third should be true
      // so result will be true
      result = second && third;
    }

    if(result) {
      System.out.println("Two boolean variables are true.");
    }
    else {
      System.out.println("Two boolean variables are not true.");
    }

    input.close();
  }

}

输出 1

Enter first boolean value: true
Enter second boolean value: false
Enter third boolean value: true
Two boolean variables are true.

输出 2

Enter first boolean value: false
Enter second boolean value: true
Enter third boolean value: false
Two boolean variables are not true.

在上面的示例中，我们有三个名为first、second和third的布尔变量。在这里，我们检查了这三个布尔变量中有两个是否为真。

我们使用if...else语句来检查两个布尔变量是否为真。

if(first) {
  result = second || third;
}
else {
  result = second && third;
}

在这里，我们可以使用三元运算符代替if...else语句。

result = first ? second || third : second && third;

另请阅读

• Java 程序：将 boolean 变量转换为 String
• Java 程序：将 String 类型变量转换为 boolean