Java中Switch-Case穿透事件 我们在学习分支结构时,除了用到if,if…else,还会用到switch-case结构。在有多重选择时,多次使用if…else,就会显得代码框架很长。而此时,switch…case是一种不错的选择。 所谓的穿透原则就是因为在一个case语句末尾没有break。 系统在执行完该case,会认为语句没有结束,无论紧挨着
importjava.util.Scanner;publicclassDaysInMonth{publicstaticvoidmain(String[]args){Scannerscanner=newScanner(System.in);System.out.print("请输入月份(1-12):");intmonth=scanner.nextInt();System.out.print("请输入年份:");intyear=scanner.nextInt();intdays;switch(month){case1:case3:case5:case7:c...
Java的switch 语句 就会接着执行下一个case分支语句。这种情况相当危险,常常会引发错误switch语句的执行过程如下:表达式的值与每个case语句中的常量作比较。如果发现了一个与之相匹配的,则执行该case语句后的代码。如果没有一个case常量与表达式的值相匹配,则执行default语句。当然,default语句是可选的。如果没有相匹配...
for...in循环不仅遍历数字键名,还会遍历手动添加的其他键,甚至包括原型链上的键。 某些情况下,for...in循环会以任意顺序遍历键名。 for...in循环主要是为遍历对象而设计的,不适用于遍历数组。 for…of循环 有着同for...in一样的简洁语法,但是没有for...in那些缺点。 不同于forEach方法,它可以与break、cont...
The switch statement falls under decision-making statements, allowing your program to choose different paths of execution based on an expression’s outcome. Grasping the Concept of ‘Fall Through’ in Switch Statements A unique characteristic of the switch statement in Java is the ‘fall through’ ...
When Java reaches abreakkeyword, it breaks out of the switch block. This will stop the execution of more code and case testing inside the block. When a match is found, and the job is done, it's time for a break. There is no need for more testing. ...
java switch case 用法详解 1.普通用法 public static void test(){ int i = 5; switch (i){ case 5:...public static void test(){ int i = 11; switch (i){ case 5:case 11:case...public static void test(){ int i = 11; switch (i){ case 5:case 11:case 12...public static voi...
Switchhas evolved over time. New supported types have been added, particularly in Java 5 and 7. Also, it continues to evolve —switchexpressions will likely be introduced in Java 12. Below we’ll give some code examples to demonstrate the use of theswitchstatement, the role of thebreakstatem...
// Java program to demonstrate an enum// in switch casepublicclassMain{enumVehicle{BIKE,CAR,BUS}publicstaticvoidmain(String[]args){String str="BUS";switch(Vehicle.valueOf(str)){caseBIKE:System.out.println("BIKE is for 2 persons.");break;caseCAR:System.out.println("CAR is for 5 persons...
c sharp 的输入,输入,switch语句。 代码语言:javascript 代码运行次数: using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ConsoleApplication1{classProgram{staticvoidMain(string[]args){Console.WriteLine("put small char:");char ch1=...