// interfaces/InterfaceCollision.java

// (c)2021 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

interface I1 { void f(); }

interface I2 { int f(int i); }

interface I3 { int f(); }

class C { public int f() { return 1; } }

class C2 implements I1, I2 {

@Override

public void f() {}

@Override

public int f(int i) { return 1; } // Overloaded

}

class C3 extends C implements I2 {

@Override

public int f(int i) { return 1; } // Overloaded

}

class C4 extends C implements I3 {

// Identical, no problem:

@Override public int f() { return 1; }

}

// Methods differ only by return type:

//- class C5 extends C implements I1 {}

//- interface I4 extends I1, I3 {}