26 lines
594 B
Java
26 lines
594 B
Java
|
//: interfaces/InterfaceCollision.java
|
||
|
|
package interfaces;
|
||
|
|
|
||
|
|
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 {
|
||
|
|
public void f() {}
|
||
|
|
public int f(int i) { return 1; } // overloaded
|
||
|
|
}
|
||
|
|
|
||
|
|
class C3 extends C implements I2 {
|
||
|
|
public int f(int i) { return 1; } // overloaded
|
||
|
|
}
|
||
|
|
|
||
|
|
class C4 extends C implements I3 {
|
||
|
|
// Identical, no problem:
|
||
|
|
public int f() { return 1; }
|
||
|
|
}
|
||
|
|
|
||
|
|
// Methods differ only by return type:
|
||
|
|
//! class C5 extends C implements I1 {}
|
||
|
|
//! interface I4 extends I1, I3 {} ///:~
|