Below we’ll give some code examples to demonstrate the use of theswitchstatement, the role of thebreakstatement, the requirements for theswitchargument/casevalues and the comparison ofStrings in aswitchstatement. Let’s move on to the example. 2. Example of Use Let’s say we have the foll...
For example, class Main { public static void main(String[] args) { int expression = 2; // switch statement to check size switch (expression) { case 1: System.out.println("Case 1"); // matching case case 2: System.out.println("Case 2"); case 3: System.out.println("Case 3");...
In this example, the switch statement checks the value of the stringday. Depending on the value, it prints a different message. This is a powerful feature that can greatly simplify your code when dealing with string conditions. Exploring Alternatives to Java Switch Statement While the switch stat...
Java Switch. Part I: Statement Java中的switch语句是一个强大的流程控制工具,允许开发人员执行一段代码。levelup.gitconnected.com 让我们来区分switch语句和switch表达式。主要的区别在于switch表达式会返回一个值,而switch语句则不会。可以说,switch表达式相当于一个可以返回值的增强版switch语句。 收益(注释:上下文...
Example 1: Java continue statement class Main { public static void main(String[] args) { // for loop for (int i = 1; i <= 10; ++i) { // if value of i is between 4 and 9 // continue is executed if (i > 4 && i < 9) { continue; } System.out.println(i); } } } ...
Switch Expression Example publicclassSwitchStatement{publicstaticvoidmain(String[]args){System.out.println("Monday is : "+isWeekDay(Day.TUE));System.out.println("Monday is : "+isWeekDay(Day.SUN));}publicstaticBooleanisWeekDay(Dayday){Booleanresult=switch(day){caseMON,TUE,WED,THUR,FRI->true...
Java Switch Statements Instead of writingmanyif..elsestatements, you can use theswitchstatement. Theswitchstatement selects one of many code blocks to be executed: SyntaxGet your own Java Server switch(expression){casex:// code blockbreak;casey:// code blockbreak;default:// code block}...
publicclassDataTypeExample{publicstaticvoidmain(String[] args){// 基本数据类型byteb=10;shorts=1000;inti=100000;longl=10000000000L;floatf=3.14f;doubled=3.141592653589793;charc='A';booleanflag=true;// 包装类Integerinteger=10;// 自动装箱intnum=integer;// 自动拆箱// 类型转换longlongValue=i;// ...
方法由方法名、返回类型、参数列表和方法体组成。例如,“main” 方法的返回类型是 “void”(表示不返回任何值),参数列表是 “String [] args”(用于接收命令行参数),方法体就是大括号内的代码 “System.out.println ("Hello, World!");”。 语句(Statement):Java 程序由一系列语句组成,每条语句以分号(;)...
因为 switch 不支持 null 对象，不处理的话会抛 NullPointerException ，