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Interface Question

 
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Why is this a compile-time error?
interface A {
String s1 = "A";
String m1();
}
interface B implements A {
String s1 = "B";
String m1();
}
 
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Interface can only extend one or more interfaces no implementation of interfaces.
I hope that helps
Archana
 
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interface A {
String s1 = "A";
String m1();
}
interface B extends A {//OK
String s1 = "B";
String m1();
}
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