Basic Java Lambda Syntax Variants

JavaLambdaSyntax

import java.util.function.BiFunction;
import java.util.function.Consumer;
import java.util.function.Supplier;

public class JavaLambdaSyntax {

    private Consumer<String> stringConsumer;
    private Supplier<String> stringSupplier;
    private BiFunction<String, String, String> stringBiFunction;

    public void zeroParamLambda() {
        // zero parameters -> parameter parentheses required
        // one line function -> no return statement required
        stringSupplier = () -> "Blah";
    }

    public void singleParamLambda() {
        // one parameter -> no parameter parentheses required
        // one line function -> no return statement required
        stringConsumer = stringParam -> System.out.println(stringParam);
    }

    public void doubleParamLambdaOneLine() {
        // > 1 parameter -> parentheses required
        stringBiFunction = (param1, param2) -> param1.concat(param2);
    }

    public void methodExpression() {
        // Same as singleParamLambda but use method reference which is syntactic sugar
        stringConsumer = System.out::println;
    }

    public void multiLineExpression() {
        stringSupplier = () -> {
            System.out.println("do some work");
            return "blah";
        };
    }

}