As you become more comfortable with the basic usage of the switch statement in Java, you can start to explore some of its more advanced applications. Two such applications include nested switch statements and u
Notice that in this example, the grade is hardcoded with the statement char Grade = ‘B’;. Typically, the expression will contain variables that are dependent on other parts of the program as a hard coded variable negates the purpose of using the switch statement in the first place. public...
We can’t pass thenullvalue as an argument to aswitchstatement. If we do, the program will throwNullPointerException, using our firstswitchexample: @Test(expected=NullPointerException.class) public void whenSwitchAgumentIsNull_thenNullPointerException() { String animal = null; Assert.assertEquals(...
Example: Java switch Statement // Java Program to check the size // using the switch...case statement class Main { public static void main(String[] args) { int number = 44; String size; // switch statement to check size switch (number) { case 29: size = "Small"; break; case 42...
1. Switch Statements 1.1. Syntax The general form of a switch statement is – switch(expression){caselabelOne:statements;break;caselabelTwo:statements;break;caselabelThree:statements;break;default:statements;} The expression value must be one of the following 6 types: ...
示例:Java switch 语句 // Java Program to check the size// using the switch...case statementclassMain{publicstaticvoidmain(String[] args){intnumber =44; String size;// switch statement to check sizeswitch(number) {case29: size ="Small";break;case42: ...
lead to disastrous results. If you have forgotten to put a “break” in “case 0” in the code example below, the program will write “Zero” followed by “One”, since the control flow inside here will go through the entire “switch” statement until it reaches a “break”. For ...
In the above program, we are using the for loop to print the value of i in each iteration. To know how for loop works, visit the Java for loop. Here, notice the statement, if (i == 5) { break; } This means when the value of i is equal to 5, the loop terminates. Hence we...
Program Creek : Why String is immutable in Java? (opens new window) (opens new window) #String, StringBuffer and StringBuilder 1. 可变性 String 不可变 StringBuffer 和 StringBuilder 可变 2. 线程安全 String 不可变,因此是线程安全的 StringBuilder 不是线程安全的 ...
1. Switch Statements 1.1. Syntax The general form of a switch statement is – switch(expression){caselabelOne:statements;break;caselabelTwo:statements;break;caselabelThree:statements;break;default:statements;} The expression value must be one of the following 6 types: ...