"); //without braces only this statement will fall under if System.out....
与if-then和if-then-else语句不同,switch语句可以有许多可能的执行路径,switch使用byte、short、char和int原始数据类型,它还适用于枚举类型(在枚举类型中讨论),String类,以及一些包含某些基本类型的特殊类:Character、Byte、Short和Integer(在Number和String中讨论)。 以下代码示例SwitchDemo声明了一个名为month的int,其...
Unfortunately, without the curly braces, the code can have a deeply misleading appearance. Above, it appears (due to the misleading indentation) that the println() is under the control of the if-statement, but it is not. The "score = 100;" is controlled by the if-statement, and the pr...
Boolean Expression Required: The condition inside an if statement must be a Boolean expression that evaluates to true or false. Curly Braces for Multiple Statements: If there is more than one statement inside if or else, enclose them within { } curly braces. Single Statement Optional Braces: ...
复制 // declaration statement double aValue = 8933.234; 最后,控制流语句 调节语句执行的顺序。你将在下一节学习有关控制流语句的内容,控制流语句。 块 一个块 是在平衡大括号之间的零个或多个语句组成的组,可以在允许单个语句的任何地方使用。下面的例子,BlockDemo,演示了块的使用: 代码语言:javascript 代码...
//without return statement and without curly braces MathOperation division = (int a, int b) -> a / b;System.out.println("10 + 5 = " + tester.operate(10, 5, addition)); System.out.println("10 - 5 = " + tester.operate(10, 5, subtraction));...
}//当“then”只有一个语句时,大括号可写可不写voidapplyBrakes(){// same as above, but without bracesif(isMoving) currentSpeed--; } The if-then-else Statement 没啥好说 The switch Statement 与if-then和if-then-else语句不同,switch语句可以有多个可能的执行路径。switch处理byte、short、char和int...
void applyBrakes() { // same as above, but without braces if (isMoving) currentSpeed--; } 决定何时省略大括号是个人品味的问题。省略它们可能会使代码更脆弱。如果稍后向“then”子句添加第二个语句,一个常见的错误是忘记添加新需要的大括号。编译器无法捕捉到这种错误;你只会得到错误的结果。 if-then-...
Alternatively, you can use a return statement: p -> { return p.getGender() == Person.Sex.MALE && p.getAge() >= 18 && p.getAge() <= 25; } A return statement is not an expression; in a lambda expression, you must enclose statements in braces ({}). However, you do not have...
In this case, any module that readsjava.desktopalso implicitly readsjava.xml. For example, if a method from thejava.desktopmodule returns a type from thejava.xmlmodule, code in modules that readjava.desktopbecomes dependent onjava.xml. Without therequires transitivedirective injava.desktop’s mod...