Answer Posted / sirisha

overridding:
same method name and same signature.
import java.io.*;
class sum
{
int a=10,b=15;
void sum()
{
int sum=a+b;
System.out.println("sum is:"+sum);
}
}
class sum1 extends sum
{
int c=20;
void sum()
{
int sum1=a+b+c;
System.out.println("sum1 is:"+sum1);
}
}
class override{
public static void main(String[] arg){
sum s=new sum();
s.sum();
sum1 s1=new sum1();
s1.sum();
}
}

over loading:
method name same but different signature.
class sum{
void add(int a,int b){
}
class sum{
void add(string s1,string s2){
}

What are local variables?

1052

---

What are the 8 primitive data types in java?

1016

---

What is t in parametric equations?

986

---

Is there any way to find whether software installed in the system is registered by just providing the .exe file? I have tried the following code but its just displaying the directory structure in the registry. Here the code : package com.msi.intaller; import java.util.Iterator; import ca.beq.util.win32.registry.RegistryKey; import ca.beq.util.win32.registry.RootKey; public class RegistryFinder { public static void main(String... args) throws Exception { RegistryKey.initialize(RegistryFinder.class.getResource("jRe gistryKey.dll").getFile()); RegistryKey key = new RegistryKey(RootKey.HKLM, "Software\\ODBC"); for (Iterator subkeys = key.subkeys(); subkeys.hasNext();) { RegistryKey subkey = subkeys.next(); System.out.println(subkey.getName()); // You need to check here if there's anything which matches "Mozilla FireFox". } } }

1798

---

why doesn't java run on all platforms?

1023

---

Why is logger singleton?

1114

---

What is equlas() and hashcode() contract in java? Where does it used?

1128

---

What are the two types of exceptions in java? Which are the differences between them?

1094

---

What are controls and their different types in awt?

1082

---

What are void pointers?

1294

---

How many JVMs can run on a single machine and what is the meaning of Just-In-Time (JIT) compiler?

1441

---

How do you end a program?

1114

---

Can a final variable be null?

1013

---

how to create constants in java?

1078

---

What are methods of a class?

1028

---