并根据索引将它们设置到页面switch只能比较数值或字符或者类对象 首先看看switch的括号，当中放置您要...
Compilation of switch statements uses the tableswitch and lookupswitch instructions. The tableswitch instruction is used when the cases of the switch can be efficiently represented as indices into a table of target offsets. The default target of the switch is used if the value of the expression of...
Where the cases of the switch are sparse, the table representation of the tableswitch instruction becomes inefficient in terms of space. The lookupswitch instruction may be used instead. The Java virtual machine specifies that the table of the lookupswitch instruction must be sorted by key so that ...
Javaswitch语句用于从多个条件执行一个语句。它就像if-else-if语句一样。 语法: switch(expression){casevalue1://code to be executed;break;//optionalcasevalue2://code to be executed;break;//optional...default:// code to be executed if all cases are not matched;} Java switch语句执行流程图如下...
Java Copy In this example, we have a switch statement that checks the value of the variableday. Depending on the value, it executes a different code block. Ifdayis 1, it prints ‘Monday’. Ifdayis 2, it prints ‘Tuesday’. In our case,dayis 3, so none of the cases match and not...
Javaswitch语句用于从多个条件执行一个语句。它就像if-else-if语句一样。 语法: switch(expression){ case value1: //code to be executed; break; //optional case value2: //code to be executed; break; //optional …… default: // code to be executed if all cases are not matched; ...
Java switch语句用于从多个条件执行一个语句。它就像if-else-if语句一样。 语法: switch(expression){ case value1: //code to be executed; break; //optional case value2: //code to be executed; break; //optional ... default: // code to be executed if all cases are not matched; } 1...
Java 12 Enhancements: As of Java 12, you can use switch expressions to return values directly from cases, simplifying the syntax and enhancing code readability. enumDay{MONDAY,TUESDAY,WEDNESDAY,THURSDAY,FRIDAY,SATURDAY,SUNDAY}publicclassSwitchEnumExample{publicstaticvoidmain(String[]args){Day day=Day...
At the moment, in Java 12, the switch cases support only switching on enum, String, byte, short, char, int, and their wrapper classes. However, in the future there may well be more sophisticated forms and support for structural pattern matching on arbitrary “switchable” types. ...
of which has an average of seven cases. Fall through occurs in just 3% of all these cases.