Answer Posted / pratiksha

import java.util.*;
class alpha
{
String let;
public alpha(String l)
{
this.let=l;
}
}

public class Duplicateletters
{
public static void main(String []args)
{
int i=0;
String[] letters = {"a", "b", "b", "c" ,"a", "d","a"};
ArrayList<alpha> a = new ArrayList<alpha>();
for(i=0;i<letters.length;i++)
{
a.add(new alpha(letters[i]));
}
String let1=null;
Iterator<alpha> i1 = a.iterator();
while(i1.hasNext())
{
alpha a1 = i1.next();
let1=a1.let;
}
int j=0;
Iterator<alpha> i2 = a.iterator();
while(i2.hasNext())
{

alpha a2 = i2.next();
if(let1==a2.let)
{
j=j+1;
}
}
System.out.println(j);

}
}

Add a value x to array from index l to r where 0 <= l <= r <= n-1

1093

---

What are the parts of methodology?

974

---

Explain the difference between an Interface and an Abstract class?

1172

---

What is meant by string is immutable?

1082

---

how to create daemon thread in java?

1074

---

Say you want to store the information about a number of pets in an array. Typical information that you could store for each pet (where relevant) would be • Breed of animal • Animal's name • Its birth date • Its sex • Whether it has been sterilised or not • When it is due for its next inoculation • When it last had its wings clipped For each type of pet (eg. dog, cat or bird) you would typically define a class to hold the relevant data. Note: You do not need to implement these classes. Just answer the following questions. 3.1.1 What would be the advantage of creating a superclass (eg. Pet) and declaring an array of Pet objects over simply using an array of Objects, storing each of the instances of the different pet classes (eg. Dog, Cat or Bird) in it? 3.1.2 Would you define Pet as a class or as an interface? Why? (2) (2)

1817

---

What is qms certification?

955

---

What initialize variables?

1022

---

What java ide should I use?

992

---

What is the generic class?

969

---

Differences between external iteration and internal iteration?

1161

---

Explain jvm, jre, and jdk?

1017

---

How do generics work in java?

1029

---

How do you empty a list in java?

975

---

Can two objects have same hashcode?

997

---