suppose in a class there is a code like this: { Set hs=new Hashset(); hs.add(

suppose in a class there is a code like this:
{
Set hs=new Hashset();
hs.add(new Emp("kathy",1000));
hs.add(new Emp("kathy",2000));
}
how can u avoid the above code in your class as set won't
allow duplicate objects?

Question Posted / murali

3 Answers
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suppose in a class there is a code like this: { Set hs=new Hashset(); hs.add(new Emp("kathy&..

Answer / harish

This can achieved by overriding equals and hashCode method

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suppose in a class there is a code like this: { Set hs=new Hashset(); hs.add(new Emp("kathy&..

Answer / mushtaq hussain

by implementing equals and toHashCode method in emp Class

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suppose in a class there is a code like this: { Set hs=new Hashset(); hs.add(new Emp("kathy&..

Answer / venkata rao ummadisetty

Hi,

Can any one provide a full Example for using HashCode and
equals method

class Emp{
private String name;
private int salary;
Emp(String s,int p){
this.name=s;
this.salary=p;
}

public String toString(){
return name+":"+salary;

}

}

// In public static void main method

Set hs=new HashSet();
hs.add(new Emp("kathy",1000));
hs.add(new Emp("kathy",2000));
hs.add(new Emp("kathy",2000));
java.util.Iterator er=hs.iterator();

while(er.hasNext()){
System.out.println(er.next());}

Is This Answer Correct ?

0 Yes

1 No

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