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A class can only have one parent class but can implement several interfaces
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interfaces are essentially abstract classes and can have methods without impementation and static variables
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interface Printable {
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void print();
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void print(String str);
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}
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class Cookie implements Printable {
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void print() {
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System.out.println("Cookie");
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}
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}
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class WastePaper implements Printable {
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void print(String str) {
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int i,len=str.length();
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for(i=0; i < len; i++) {
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singlechar = str.charAt(i);
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System.out.println("This is character No." + i + " " + singlechar);
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}
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}
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}
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