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InterfaceUseDemo.java
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55 lines (46 loc) · 884 Bytes
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package Interfaces;
interface X {
void print();
}
// SAM Interface
@FunctionalInterface
interface Z {
void add(int x, int y);
// void sub(int x, int y);
}
class Y implements X {
@Override
public void print() {
}
}
public class InterfaceUseDemo {
public static void main(String[] args) {
// 1. obj create
// 2. class create
// 3. interface implement
// 4. method override
// 5. Upcasting
X obj = new X() {
@Override
public void print() {
System.out.println("Print Call");
}
};
obj.print();
// 1. obj create
// 2. class create
// 3. interface implement
// 4. method override
// 5. Upcasting
X obj2 = () -> System.out.println("Print Call");
Z obj3 = (a, b) -> {
System.out.println(a + b);
System.out.println(a + b);
System.out.println(a + b);
};
obj3.add(90, 77);
/*
* Y obj = new Y(); obj.print();
*/
}
}