This is a simple java program about list for beginners. Array list allows programmers to performs different operations like add, delete and modify the list.
Source Code
import java.util.*;
import java.util.Scanner;
public class ListFunction {
static List<Integer> integer_list = new ArrayList<Integer>();
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
boolean y=true;
System.out.println("**** List in Java ******* ");
do{
System.out.println(" 1 : Insert ");
System.out.println(" 2 : Search ");
System.out.println(" 3 : Delete ");
System.out.println(" Choice : ");
int choice=input.nextInt();
switch(choice)
{
case 1:
insert();
break;
case 2:
search();
break;
case 3:
delete();
break;
default:
System.out.println("Invalid Input");
break;
}
System.out.println("Want Again (y/n) ? ");
String x=input.next();
char ch=x.charAt(0);
if( ch=='n')
y=false;
}
while(y!=false);
}
public static void insert()
{
Scanner insert=new Scanner(System.in);
boolean y=true;
do{
System.out.println("Enter Number : ");
int num=insert.nextInt();
if(num==0)
System.out.println("Enter Number Greater Than Zero ! ");
else
integer_list.add(num);
System.out.println("Insert Again (y/n) ?");
String next=insert.next();
char ch=next.charAt(0);
if( ch=='n')
y=false;
}
while(y!=false);
}
public static void search()
{
System.out.println("Enter Number for Search = ");
Scanner search=new Scanner(System.in);
int num=search.nextInt();
for(int i=0;i<integer_list.size();i++){
if(integer_list.get(i)==num)
System.out.println(num+" Found in Index : "+i);
}
if(integer_list.lastIndexOf(num)==-1)
System.out.println(num+" Not Present :( ");
}
public static void delete()
{
Scanner delete=new Scanner(System.in);
System.out.println("Enter Index Number for Delete = ");
int delete_num=delete.nextInt();
integer_list.remove(delete_num);
}
}
Output of the Program
 |
| Java List functions |
This is exactly the kind of information that makes me love the internet just a little bit more every day.I was perplexed for a while, great post.You have really helped me thank you very much :)
ReplyDelete