How to use Lamdba expressions in java

1. If Lamdba only requires one parameter, the parentheses can be omitted

Consumer<String> con = str -> {System.out.println(str)}

2. Lamdba requires one parameter, but there is no return value

Consumer<String> con = (String str) -> {System.out.println(str)}

3. The data type can be omitted.

Because it can be inferred by the compiler, it is called type inference

Consumer<String> con = (str) -> {System.out.println(str)}

4. Lamdba requires more than two parameters.

Multiple execution statements, and can have return values

Comparator<Integer>com = (o1,o1) -> {
Syste.out.println("Lamdba表达式使用");
    return Integer.compare(o1,o2);
}

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