一元运算符,也叫单项算符,一目运算符,一元算符 ,英文名字:UnaryOperator。
描述:接受一个参数为类型T,返回值类型也为T。
源码:
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public interface UnaryOperator<T> extends Function<T, T> {
<span style= "color: #3366ff" > /**
* Returns a unary operator that always returns its input argument.
*
* @param <T> the type of the input and output of the operator
* @return a unary operator that always returns its input argument
*/
</span> static <T> UnaryOperator<T> identity() {
return t -> t;
}
}
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测试代码:
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@Test
public void test(){
super .print(UnaryOperator.identity().apply( 1 )); //<span style="color: #00ff00">输出1
</span> super .print(UnaryOperator.identity().apply( false )); //<span style="color: #00ff00">输出false
</span> super .print(UnaryOperator.identity().apply( "string" )); //<span style="color: #00ff00">输出string
</span> }
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总结
以上就是本文关于Java编程一元运算符的实例介绍,希望对大家有所帮助。感谢大家对本站的支持。
原文链接:http://blog.csdn.net/z345434645/article/details/53876578