Lambda and Anonymous function Java

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Lambda Function and Anonymous function

Defination

A more concise way to represent anonymous classes that implement certain interfaces

Grammar

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(Parameters) ->{Code Block}

eg:

without para

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() -> System.out.println("Hello, World!")

With one para

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x -> System.out.println(x)

with more para

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(x, y) -> x + y

combine with the function

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Runnable run = () -> System.out.println("Running...");
new Thread(run).start();

Anonymous function

Defination

An unnamed function

Often used for brief, one-time operations

Compare beteween Lambda and Anonymous Function

lambda

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List<String> names = Arrays.asList("Anna", "Bob", "Charlie");
Collections.sort(names, (a, b) -> a.compareTo(b));

anonymous function

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List<String> names = Arrays.asList("Anna", "Bob", "Charlie");
Collections.sort(names, new Comparator<String>() {
    @Override
    public int compare(String a, String b) {
        return a.compareTo(b);
    }
});