What is the correct syntax for declaring a class that implements two interfaces

Question

I'm writing a class that should implement two interfaces, DNARecord and Comparable.

When I I do something like

 public class FastqRecord implements DNARecord  Comparable<FastaRecord>{}

the class does not compile.

If I do this

 public class FastqRecord implements DNARecord  {}

it works, but I don't know what to do with Comparable. Should I put it on the constructor or how do I add it to the class declaration?

Possible duplicate of [Can an interface extend multiple interfaces in Java?](http://stackoverflow.com/questions/19546357/can-an-interface-extend-multiple-interfaces-in-java) — Paul Hicks, Mar 17 '16 at 19:53

score 2 · Answer 1 · answered Mar 17 '16 at 02:56

2

Implement multiple interfaces by separating them with commas.

public class FastqRecord implements DNARecord, Compareable<FastaRecord>
{
}

This has nothing to do with a constructor though.

answered Mar 17 '16 at 02:56

Paul Hicks

score 0 · Answer 2 · edited Mar 17 '16 at 03:07

0

You forgot the comma:

public class FastqRecord implements DNARecord,  Compareable<FastaRecord>{}

edited Mar 17 '16 at 03:07

Pang

answered Mar 17 '16 at 03:00

Vitaliy

2 Answers2