16IF语句

//单if语句
public class If {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("今天天气不错，去网吧");
        int age = 19;
        if (age >= 18) {
            System.out.println("进入网吧");
            System.out.println("开始骂人");
            System.out.println("结账走人");
        }
        System.out.println("回家吃饭");
    }
}

//标准的if - else语句
    public static void main(){
        int num = 222;
        if (num % 2 == 0) {//如果除以2能够余数为0，说明是偶数
            System.out.println("偶数");
        }else {
            System.out.println("奇数");
        }
}

/*
 * x和y的关系满足如下
 * 
 * 如果x >= 3,那么 y = 2x + 1；
 * 如果 -1 < x < 3,那么y = 2x；
 * 如果x <= -1,那么 y = 2x-1;
 */
    public static void name() {
        int x = 10;
        int y;
        if (x >= 3) {
            y = -2 * x + 1;
        }else if (-1 < x && x < 3) {
            y = 2 * x;
        }else {
            y = 2 * x - 1;
        }{
            System.out.println(y);
        }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        //三元运算符
        //int max = a > b ? a : b;
        //if语句
        int a = 10;
        int b = 20;
        int max;
        if (a > b) {
            max = a;
        }else {
            max = b;
        }
        System.out.println(max);
    }
}