lambda 简单案例

1.lambda 和 匿名内部类共同实现 

public static void testLambda(){

        IntBinaryOperator binaryOperator = (int a, int b) -> {
            return a + b;
        };
        int result = binaryOperator.applyAsInt(1, 2);
        System.out.println("result = " + result); //3


        //lambda 表达是实现
        DoubleBinaryOperator doubleBinaryOperator = (double a,double b)->{
            return  a + b;
        };
        double result2 = doubleBinaryOperator.applyAsDouble(1.2,1.3);
        System.out.println("result2:" + result2);

        //匿名内部类实现
        DoubleBinaryOperator doubleBinaryOperator1 = new DoubleBinaryOperator() {
            @Override
            public double applyAsDouble(double left, double right) {
                return left + right;
            }
        };
        double result3 = doubleBinaryOperator1.applyAsDouble(2.1,2.4);
        System.out.println("result3:" + result3);


    }

 

参考连接：https://www.cnblogs.com/linlinismine/p/9283532.html

转载于:https://my.oschina.net/qimhkaiyuan/blog/3082528