In Java, if statement is used for testing the conditions. The condition matches the statement it returns true else it returns false. There are four types of If statement they are: 在Java中,if语句用于测试条件。 条件与返回true的语句匹配,否则返回false。 有四种类型的If语句: For example, if we...
if...else if...else语句 if语句后面可以跟else if...else语句,使用if,else if,else语句的时候,需要注意下面几点: if语句最多只能有一个else语句,else语句必须在最后面 if语句可以有若干个else if语句,他们必须在else语句之前 一旦其中一个else if语句检测为true,其他的else if以及else都不会被执行 语法 if....
}publicintgetCode() {returncode; }publicStringgetCapation() {returncapation; }Stringof(int code){for(TestEumtestEum :TestEum.values()) {if(testEum.getCode() == code) {returntestEum.getCapation(); } }returnnull; } } 有了枚举以后,if-else 代码块可以优化成一行代码 StringstatusStr=TestE...
Java9 中的增强Java 9 为 Optional 类添加了三个方法：or()、ifPresentOrElse() 和 stream()。or(...
可以利用语法知识,对 if else 进行简化, 例如,当 if else 满足一定条件时: if (condition1) { doSomeThing1(); } else if (condition2) { doSomeThing2(); } else if (condition3) { doSomeThing3(); } else if (condition4) { doSomeThing4(); } else { doSomeThing5(); }... 可以使用 swi...
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Java 8 Stream if-else logic example. Learn to apply if-else logic in a Java 8 stream of elements to filter elements based on certain condition.
if(condition) {// Code to execute if the condition is true}else{// Code to execute if the condition is false}Code language:Java(java) In this syntax: if: This keyword marks the beginning of theif-elsestatement. (condition): This is aconditionthat the if-else statement will evaluate. ...
Java has the following conditional statements:Use if to specify a block of code to be executed, if a specified condition is true Use else to specify a block of code to be executed, if the same condition is false Use else if to specify a new condition to test, if the first condition ...
else { // do another thing } In the above code snippet, if condition1 is true, the block of code within the first if statement will execute. If condition1 is false and condition2 is true, the block of code within the elseif statement will execute. If none of the conditions are true...