Rename and deleting a text file in JAVA

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Java

[Re-posted Renaming and deleting a text file in java, the available answer has been ignored — SA]

I have two text files namely - item.txt (file 1) and temp.txt (file 2). My goal is to search for a name in the file 1 and if found then replace it with a different name and write the updated line to file 2. Also, I have a method that checks for the lines for the string I searched in file 1. The lines that do not contain that string will be added to file 2.

So, here is where I'm stuck. Everything works fine except the part where I want to delete file 1 and rename file 2 by file 1 (i.e item.txt). Can someone please help me with any correction? I am still a beginner in Java, so my code might not be the best looking code as one might expect but this is what I tried so far. Thanks The problem is when i compile the code the updated data is written to file2 and file1 which was supposed to get deleted doesn't delete. So, what could be the problem?

package project4;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;

public class kitkat {

    PrintWriter out,in;
    Scanner in;
    Scanner temp;
    File file1 = new File("item.txt");
    File file2 = new File("temp.txt");

    public void write() throws FileNotFoundException {
        out = new PrintWriter(file1);

        out.println("User1"+ "\t"+"639755"+"\t"+"400");
        out.println("User2"+ "\t"+"639725"+"\t"+"800");
        out.close();        
    }

    public void nfile() throws IOException {
        n = new PrintWriter(new FileWriter(file2,true));
    }

    Scanner input = new Scanner(System.in);
    String replacement = "User3";
    String search;
    String total;

    public void search() {
        System.out.println("Enter your search name");
        search = input.nextLine();
        total = search; 
    }

    public void lolipop() throws IOException {
        in = new Scanner(file1);

        search();
        while(in.hasNext()) {
            String a,b,c;
            a = in.next();
            b = in.next();
            c = in.next();

            if(a.contains(search)) {
                System.out.println("Your match is found"+search);
                a = replacement;
                System.out.println(a+b+c);
                n.file();
                n.println(a+"\t"+b+"\t"+c);

                n.close();
            }
        }
    }

    public void jellybeans() throws IOException {
        temp = new Scanner(file1);
        while(temp.hasNext()) {
            String p,q,r;
            p = temp.next();
            q = temp.next();
            r = temp.next();
            if(!(p.contains(total))) {
                System.out.println(p+q+r);
                n.file();
                n.println(p+"\t"+q+"\t"+r);
                n.close();
                renamefile();
            }
        }
    }

   public void renamefile() {
       file1.delete();
       file2.renameTo(file1);
   }    
}


package project4;

import java.io.FileNotFoundException;
import java.io.IOException;

public class tuna {

    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub

        kitkat kt = new kitkat();
        kt.lolipop();
        kt.jellybeans();
    }
}