"); //without braces only this statement will fall under if System.out.println("Hurrah!2"); //not this one您应该看到：Java中的块块是平衡括号之间的零个或多个语句的组，可在允许单个语句的任何地方使用。以下示例BlockDemo演示了块的
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...
class ComparisonDemo { public static void main(String[] args){ int value1 = 1; int value2 = 2; if(value1 == value2) System.out.println("value1 == value2"); if(value1 != value2) System.out.println("value1 != value2"); if(value1 > value2) System.out.println("value1 > v...
//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...
//same as above , but without braces if(isMoving) currentSpeed--; } 1. 2. 3. 4. 5. (2). if-then-else 语句 if-then-else 语句为条件为假时提供第二条执行路径。 void applyBrakes(){ if(isMoving){ currentSpeed--; } else { ...
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-...
// same as above, but without braces if (isMoving) currentSpeed--; } Deciding when to omit the braces is a matter of personal taste. Omitting them can make the code more brittle. If a second statement is later added to the "then" clause, a common mistake would be forgetting to add...
So, a conditional statement checking if x equals 10 would be Sign in to download full-size image If x does equal 10, any statements within the braces would be executed. Other notation in the sample program may seem odd. C allows for special assignment operators, such as += or /= (as...
Braces are used around all statements, even single statements, when they are part of a control structure, such as anif-elseorforstatement. This makes it easier to add statements without accidentally introducing bugs due to forgetting to add braces. ...