FOR EXAMPLE WE R HAVING TWO LIST ELEMENTS ..BOTH LISTS
CONTAINS ID,NAME,PLACE ..I NEED TO COMPARE BOTH IDS IN TWO
LISTS,IF ID'S R SAME MEANS WE HAVE ADD THE DETAILS(LIKE
NAME,PLACE) TO MAP...HOW IS POSSIBLE ?CAN ANY ONE SUGGEST?
Answer / fraz
Lets say you have Employee class
public class Employee{
private String id;
private String name;
..getter/setters..
}
You just have to overide hascode() and equals() method in
above class.
Is This Answer Correct ? | 1 Yes | 0 No |
I dont want to use serialzable in java is there any another concept so plz tell me
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public class AboutStrings{ public static void main(String args[]){ String s1="hello"; String s2="hel"; String s3="lo"; String s4=s2+s3; //to know the hash codes of s1,s4. System.out.println(s1.hashCode()); System.out.println(s4.hashCode()); // these two s1 and s4 are having same hashcodes. if(s1==s4){ System.out.println("s1 and s4 are same."); }else System.out.println("s1 and s4 are not same."); } } Somebody told me that, == operator compares references of the objects. In the above example even though s1 and s4 are refering to same object(having same hash codes), it is printing s1 and s4 are not same. Can anybody explain in detail why it is behaving like this? Thanks in Advance RavuriVinod
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