How Can I Resolve Method Name Collisions When Implementing Multiple Interfaces in Java?

Java: Addressing Method Name Collisions in Interface Implementation

In Java, implementing multiple interfaces that define methods with identical signatures can pose a challenge if the implementing class requires different implementations for each method. Unlike C#'s explicit interface implementation, Java lacks this flexibility.

Reason for Java's Restriction:

Java prohibits multiple implementations of the same method in one class to avoid potential confusion and runtime errors. Enforcing a single implementation ensures clarity and prevents ambiguity when invoking methods.

Workaround:

To overcome this limitation, Java suggests composing a class out of two separate classes that each implement different interfaces. This composite class can then provide the functionality of both interfaces without method name collisions.

For example:

interface ISomething {
    void doSomething();
}

interface ISomething2 {
    void doSomething();
}

class Class1 implements ISomething {
    void doSomething() { ... }
}

class Class2 implements ISomething2 {
    void doSomething() { ... }
}

class CompositeClass {
    Class1 class1 = new Class1();
    Class2 class2 = new Class2();

    void doSomething1() {
        class1.doSomething();
    }

    void doSomething2() {
        class2.doSomething();
    }
}

By utilizing this workaround, a single class can exhibit the behavior of multiple interfaces, while adhering to Java's restriction on method name collisions.

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