which contains enhanced switch expressions. However, this feature is available only in preview mode currently. This means that simply running the Java compiler as usual won’t work if you use the new switch expression syntax. To enable this feature, you’ll need to use the flags...
使用switch表达式后: packageday_11_25;importjava.time.LocalDate;importjava.util.Scanner;/** *@authorsoberw */publicclassSwitchExpression{publicstaticvoidmain(String[] args){Scannersc=newScanner(System.in); System.out.print("请输入年份:");intyear=sc.nextInt(); System.out.print("请输入月份:")...
switch(expression){casevalue1:// 执行代码块1break;casevalue2:// 执行代码块2break;casevalue3:// 执行代码块3break;...default:// 执行默认代码块break;} 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. expression是一个表达式,它的值将与每个case标签的值进行比较。 case valu...
In Java, a switch statement generally allows the application to have multiple possible execution paths based on the value of a given expression in runtime. The evaluated expression is called the selector expression which must be of type char, byte, short, int, Character, Byte, Short, Integer,...
Java 中的switch语句是一种控制结构,允许根据不同的条件执行不同的代码块。其基本语法如下: switch(expression){casevalue1:// code blockbreak;casevalue2:// code blockbreak;default:// default block} 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. ...
java填空在switch(expression)语句中,expression的数据类型不能是___。 为什么? 答案 不能为引用类型、自定义类型。基本类型中,只能为整型,且有大小限制 1、整型:最大为int,可以是byte,char 2、还可以为枚举类型,这个可以是自定义的枚举类型。1、2以外的都不行相关推荐 1java填空在switch(expression)语句中,expre...
default: Executes if no case value matches the expression. Examples Example 1: Basic Usage publicclassSwitchExample{publicstaticvoidmain(String[]args){int day=3;switch(day){case1:System.out.println("Monday");break;case2:System.out.println("Tuesday");break;case3:System.out.println("Wednesday"...
The Java Virtual Machine's tableswitch and lookupswitch instructions operate only on int data. Because operations on byte, char, or short values are internally promoted to int, a switch whose expression evaluates to one of those types is compiled as though it evaluated to type int. ...
如果只是浅尝辄止，知道 Java String 类型的 switch 用的 hashCode 就行了。String 的 hashCode() 方法...
Please note that the above code snippet does not have adefaultcase. As long as all cases are covered, theswitchexpression will be valid. 6. Conclusion In this article, we discussed the subtleties of using theswitchstatement in Java. We can decide whether to useswitchbased on readability and...