Write a program to perform string operations using ArrayList. Write functions for the following a. Append – add at end b. Insert – add at particular index c. Search d. List all string starts with given letter.
Aim: Introduce Java Collections.
Program:-
import java.util.*;
public class ArrayL
{
ArrayList<String> list=new ArrayList<String>(); //Creating arraylist
public void arraydisplay()
{
list.add("CSE");//Adding object in arraylist
list.add("ISE");
list.add("ME");
System.out.println("ArrayList element are");
System.out.println(list);
System.out.println("");
}
public void appendatend()
{
System.out.println("Enter the element to append at end");
Scanner scob1=new Scanner(System.in);
String ele=scob1.next();
list.add(ele);
System.out.println(list);
System.out.println("");
}
public void insertatpos()
{
System.out.println("Enter the position and element to insert");
Scanner scob1=new Scanner(System.in);
int posind=scob1.nextInt();
String ele=scob1.next();
list.add(posind,ele);
System.out.println(list);
System.out.println("");
}
public void searchele()
{
System.out.println("Enter the Array element to search");
Scanner scobj=new Scanner(System.in);
String arele=scobj.next();
int in=list.indexOf(arele);
if(in==-1)
{
System.out.println("Element not found");
}
else
{
System.out.println("Element found at "+in);
}
}
void print()
{
System.out.println("Enter the starting charecter to print strings");
Scanner nip=new Scanner(System.in);
char inputc=nip.next().charAt(0);
String strc=Character.toString(inputc);
System.out.println("String starting with character "+strc);
for(int i=0;i<list.size();i++)
{
if(list.get(i).startsWith(strc))
{
System.out.println(list.get(i));
}
}
}
public static void main(String args[])
{
ArrayL obj=new ArrayL();
obj.arraydisplay();
obj.appendatend();
obj.insertatpos();
obj.searchele();
obj.print();
}
}
Output:-
