Java培训：增强for循环、switch

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增强for循环
switch

增强for循环

Java5引入了一种主要用于数组的增强型for循环。例子public class ForTest {public static void main（String args[]）{int [] numbers = {1, 3, 5, 7, 2, 4, 6, 8};for （int x: numbers）{System.out.print（x）;System.out.print（","）;}System.out.println（）;String [] names = {"Jihite", "David", "Tom"};for （String name: names）{System.out.print（name）;System.out.print（","）;}}}结果1,3,5,7,2,4,6,8,Jihite,David,Tom,

switch

注：switch语句中的变量类型只能为byte、short、int或者char。public class ForTest {public static void main（String args[]）{//char grade = args[0].charAt（0）;char grade = "B";switch（grade）{case "A" :System.out.println（"Excellent！"）;break;case "B" :case "C" :System.out.println（"Well done"）;break;case "D" :System.out.println（"You passed"）;case "F" :System.out.println（"Better try again"）;break;default :System.out.println（"Invalid grade"）;}System.out.println（"Your grade is " + grade）;}}本文永久更新链接地址：http://www.linuxidc.com/Linux/2016-08/134456.htm