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leoxlin/JavaLambdaCompilerExample.java

Created April 29, 2020 05:26
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JavaLambdaCompilerExample.java
import java.util.Arrays;
import java.util.List;
import java.util.function.Function;
public class JavaLambdaCompilerExample {
interface ImplicitLambda1 {
String whatever();
}
interface ImplicitLambda2 {
String whatever(Integer x);
}
interface ImplicitLambda3 {
String whatever(Integer x, Double y);
}
interface ImplicitLambda4 {
void whatever(Integer x);
}
interface ComplexLambda extends Function<List<Integer>, Function<Integer, Function<String, String>>> {}
public static void main(String[] args) {
ImplicitLambda1 implicitLambda1 = () -> "out";
ImplicitLambda2 implicitLambda2 = x -> x + " out";
ImplicitLambda3 implicitLambda3 = (x, y) -> x + y + " out";
ImplicitLambda4 implicitLambda4 = x -> {
System.out.println("I ate x: " + x);
};
System.out.println(implicitLambda1.whatever());
System.out.println(implicitLambda2.whatever(10));
System.out.println(implicitLambda3.whatever(10, 33.33));
implicitLambda4.whatever(30);
ComplexLambda definition = list -> otherIntInput -> postfix -> {
int listSum = list.stream().reduce(Integer::sum).orElse(0);
return listSum + otherIntInput + postfix;
};
String complexLambdaResult = definition
.apply(Arrays.asList(10, 10, 10, 10, 10))
.apply(5)
.apply(" was the result");
System.out.println(complexLambdaResult);
}
}
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