A lambda expression is an unnamed function with parameters and a body.
The lambda expression body can be a block statement or an expression.
->
separates the parameters and the body.(int x) -> x + 1
takes an int parameter and returns the parameter value incremented by 1.(int x, int y) -> x + y
takes two int parameters and returns the sum.(String msg)->{System.out.println(msg);}
takes a String parameter and prints it on the standard output.msg->System.out.println(msg)
takes a parameter and prints it on the standard output. It is identical to the code above.() -> "hi"
takes no parameters and returns a string.(String str) -> str.length()
takes a String parameter and returns its length.
The following lambda takes two int parameters and returns the maximum of the two.
(int x, int y) -> { int max = x > y ? x : y; return max; }
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