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LambdaExpressionDemo.java
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42 lines (36 loc) · 1.13 KB
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package src.lambda_expressions;
@FunctionalInterface
interface MyInterfaceA {
int show(int val);
}
class ImplementorClass implements MyInterfaceA {
@Override
public int show(int val) {
System.out.println("Overridden inside another class " + val);
return val + 5;
}
}
public class LambdaExpressionDemo {
public static void main(String[] args) {
MyInterfaceA obj1 = new ImplementorClass();
obj1.show(5);
// Using anonymous inner class instead
MyInterfaceA obj2 = new MyInterfaceA() {
@Override
public int show(int val) {
System.out.println("Overridden inside anonymous inner class " + val);
return val + 5;
}
};
obj2.show(10);
// Using lambda expression instead
MyInterfaceA obj3 = value -> {
System.out.println("Overridden inside a lambda expression " + value);
return value + 5;
};
obj3.show(15);
// Using optimised lambda expression instead
MyInterfaceA obj = val -> 2 * val;
System.out.println(obj.show(7));
}
}