多个条件 - java中有"cond"吗？

int num = 10;

// 使用if语句
if (num > 0) {
    System.out.println("Number is positive");
} else if (num < 0) {
    System.out.println("Number is negative");
} else {
    System.out.println("Number is zero");
}

// 使用switch语句
switch (num) {
    case 1:
        System.out.println("Number is 1");
        break;
    case 2:
        System.out.println("Number is 2");
        break;
    default:
        System.out.println("Number is neither 1 nor 2");
}

// 使用三元运算符
String result = (num > 0) ? "Positive" : "Negative or zero";
System.out.println("Number is " + result);