madan

• Apr 3rd, 2006

 

it shows compile time error when we make this=null i.e we can not assign value to final variable

rameshr

• Apr 3rd, 2006

 

consider the  two variables and its values are a=20,b=10

a=a+b; //a=30

b=a-b;//b=20

a=a-b;//a=10

dipl. ing. Dan

• Apr 3rd, 2006

 

3. Constructors are inherited. If you have a constructor in your superclass, it will be inherited in your subclass.

Try this:

public class InheritMe {
 
 public InheritMe() {
  System.out.println("I made it into InheritMe Constructor!");
 }

}

Now extend your subclass to inherit this superclass. 

"public class MySubclass extends InheritMe { ... } "

Ranjith

• Apr 5th, 2006

 

I didn't get what you want to say about your code?? Your code does not inherited constructor, rather it is inheriting the super class

Constructors can not be inherited.

If you want make use of super class constructors, u can call that by using super keyword.

Nagarjuna S

• Apr 7th, 2006

 

For swapping try this, which is a very good method.

a=a^b;// a = a xor b

b=a^b;// b = a xor b

a=a^b;// a = a xor b

Lunaticrr

• Apr 11th, 2006

 

Could you explain what a=a^b;// a = a xor bb=a^b;// b = a xor ba=a^b;// a = a xor bis all about as opposed to a=a+b;b=a-b;a=a-b;I get the bottom one but not the top one. What does xor mean? What does ^ do?

SATISH

• Apr 14th, 2006

 

Use this technique

if the 2 variables are a and b

b = b-a ;

a = a+b;

b = a-b;

print a and b;

if we take a = 40 and b= 50

b = b-a = 50 - 40 = 10;

a = a+b = 40 + 10 = 50;//(here b is 10)

b = a-b = 50 - 10 = 40; //(here a = 50)

then a = 50 and b = 40;

if we take a = 60 and b= 30

b = b-a = 30 - 60 = -30;

a = a+b = 60 + (-30) = 30;//(here b is -30)

b = a-b = 30 - (-30) = 60; //(here a = 30)

then a = 30 and b = 60;

Jhansi

• May 24th, 2006

 

For a better understanding on Constructors, plz go through the article given below "http://www.javaworld.com/jw-10-2000/jw-1013-constructors.html".

satish.kumar.ee

 Profile Answers by satish.kumar.ee 

• Apr 22nd, 2008

 

2)  a= ((a+b)-(a-b))/2
b= ((a+b)+(a-b))/2

vinaymudgil007

 Profile Answers by vinaymudgil007 

• Jun 10th, 2008

 

The answer given above by Mr. Satish
------------------------------------------------------------------------------------------
a= ((a+b)-(a-b))/2
b= ((a+b)+(a-b))/2
------------------------------------------------------------------------------------------
will not work when one of the numbers is negative!!!

vinny

dh.agrawal

 Profile Answers by dh.agrawal 

• Jun 11th, 2008

 

Ans 2. ----
int a,b;  
a= a+b;
b=a-b;
a=a-b;