if条件

if (条件){

//代码块

}

---

import java.util.Scanner;

public class Test17 {

 public static void main(String[] args) {
     //张浩的java成绩大于90分  就奖励华为P40
     System.out.println("张浩的Java成绩是多少？");
     Scanner sc = new Scanner(System.in);
     int score = sc.nextInt();
     //if(布尔值)
     if(score>90) {
         System.out.println("奖励华为P40");
     }
         
     }
     }

---

 

镶嵌模块

 

 

import java.util.Scanner;

public class Test28 { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("请输入百米预赛的成绩（秒）："); int cj = sc.nextInt(); if (cj<=15) { System.out.println("请输入性别："); String sex = sc.next(); if (sex.equals("男")||sex.equals("女")) { System.out.println("进入"+sex+"子组决赛"); }else { System.out.println("您输入的性别有误"); } }else { System.out.println("对不起，你没资格进入决赛"); } }

}