Implement multiple interfaces : Interface and Abstract Class « Language Basics « Java

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Java » Language Basics » Interface and Abstract Class 




Implement multiple interfaces

/*
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 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */



interface I1 {
  abstract void test(int i);
}
interface I2 {
  abstract void test(String s);
}

/**
 * To show what happens to the possible conflicts if you 
 * implement multiple interfaces: there are no conflicts.
 * If multiple interfaces have the exact same method, you
 * merely have to implement it.
 * If multiple interfaces have similar methods, you must
 * implement them all.
 * There's still no conflict.
 */
public class MultInterfaces implements I1, I2 {
  public void test(int i) {
    System.out.println("In MultInterfaces.I1.test");
  }
  public void test(String s) {
    System.out.println("In MultInterfaces.I2.test");
  }
  public static void main(String[] a) {
    MultInterfaces t = new MultInterfaces();
    t.test(42);
    t.test("Hello");
  }
}


           
       














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