Messages posted by: Voodooengine

Below is my code but for some reason my pop (public Object pop) or peek public Object peek) do no work. Any help would be appreciated. Thanks.

/*
 * Main.java
 *
 * Created on October 22, 2007, 8:40 AM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */
import java.util.*;
import java.util.Scanner ;
/**
 *
 * @author
 * 4873114
 */

public class Main{
  
    int myLength;
    int currentLength;
    ArrayList ravs;
   
    public Main() {
    }
    /* source http://forum.java.sun.com/index.jspa*/

public Main(int length) {
        ravs=new ArrayList();
        int myLength=length;
        int currentLength=0;
    }
   
   
    public void push(Object item) {
        if(currentLength<myLength) {
            ravs.add(0,item);
            currentLength++;
        }
       
    }
   
   
    public Object pop() {
        if(this.empty()==false) {
            currentLength--;
            return ravs.remove(0);}
       
        else return null;
    }
   
    public Object peek() {
        return ravs.get(0);
    }
   
   
    public boolean empty() {
        if(ravs.get(0)==null) {
            return true;} else {
            return false;}
    }
   
    public boolean full() {
        if(currentLength==myLength) {
            return true;} else {
            return false;}
    }
   
    public String tostring() {
        String x="";
        for(int a=0;a<ravs.size();a++) {
            x=x+ ravs.get (a);}
        return x;
    }
   
    public static void main(String[] args) {
            Scanner in = new Scanner(System.in);
            int lol;
    System.out.println ("Enter Your Option");
    System.out.println("1: Push");
    System.out.println("2: pop");
    System.out.println("3: peek");
    System.out.println("4: empty");
    System.out.println("5: full");
    System.out.println("6: tostring");
    System.out.println("7: remove all elements");
 Main johnathan= new Main(5);
//  int choice = in.nextInt ();

System.out.println("Enter the number of choices you would like to make");
 int choice1 = in.nextInt();
  for(int abc=0; abc<choice1; abc++){
      System.out.println ("Enter Your Option");
    System.out.tln("1: Push");
    System.out.println("2: pop");
    System.out.println("3: peek");
    System.out.println("4: empty");
    System.out.println("5: full");
    System.out.println("6: tostring");
    System.out.println("7: remove all elements");
 int choice = in.nextInt ();

if(choice==1){
      System.out.println("Enter a # to push");
      lol= in.nextInt();
      johnathan.push((Object)lol);
  }
    if(choice==2){
        System.out.println("Enter a # to pop");
      System.out.println(johnathan.pop());
  }
    if(choice==3){
               System.out.println("Enter a # to peek");
      System.out.println(johnathan.peek());
  }
    if(choice==4){
         System.out.println("Emptied");
      System.out.println(johnathan.empty());      
  }
    if(choice==5){  System.out.println("FULL");
      System.out.println(johnathan.full());
  }
    if(choice==6){
         System.out.println("TO STRING");
      System.out.println(johnathan.tostring());
  }
    if(choice==7){
         System.out.println("REMOVE ALL");
      johnathan.removeAllElements();
  }
  
   }
   
    }
   
    public void removeAllElements() {
        ravs.clear();}
   
   
}

[b]

Im trying to get when n = 4 to input a number into the array. Secondly ive been reading code on how to delete a number via scanner but i cant figure out the code.

thanks

Things to do:
-Add five extra elements into array
-Add a number
-Make sure # not in Array, f so do not add
-Replace #
-Number must be in array to replace
-Delete #

/*
 * Main.java
 *RAVI GUPTA
 *October 12th
 * Created on September 26, 2006, 8:41 AM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

import java.util.Scanner;
import java.io.*;
import java.util.Arrays;
/**
 *
 * @author 4873114
 */
public class Main {
    
    /** Creates a new instance of Main */
    public Main() {
    }
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a[]={6,10,1,5,8,12,15,18,3,4};
        System.out.println("1 Find Largest Number");
        System.out.println("2 Sort Array");
        System.out.println("3 Find a number");
        System.out.println("4 Exit Program");
        int n= sc.nextInt();
        int c=0;
        int j=0;
        while(n>4){    
            String s= "~Hello person, you seem to have stumbled upon the wrong key on the num pad. This sentence is meant to aid you in your struggle to find the correct Key. Please refer to the right hand side of your keyboard, and make sure that Numlock is on. Secondly make sure to press the correct key. IF you fail to do so, H! will get you~";
            System.err.println(s);
            System.out.println("1 Find Largest Number");
            System.err.println("2 Sort Array");
            System.err.println("3 Find a number");
            System.err.println("4 Add five extra elements");
            System.err.println("10 Exit Program");
            n= sc.nextInt();
            c++;
            if(c==3){
                System.err.println("Henry is on the way");
                System.err.println("~YOu like to hog res0urces, go away and never come back. Henry has been alerted, and will shorty be 'paying' you a visit. Run!");
                c++;
            }
            if(c==4){
                for(int i=0; i<100000; i++){
                    System.err.println("~Hello person, you seem to have stumbled upon the wrong key on the num pad. This sentence is meant to aid you in your struggle to find the correct Key. Please refer to the right hand side of your keyboard, and make sure that Numlock is on. Secondly make sure to press the correct key. IF you fail to do so, H! will get you~");
                    System.out.println("1 Find Largest Number");
                    System.err.println("2 Sort Array");
                    System.err.println("3 Find a number");
                    System.err.println("4 Exit Program");
                    System.out.println("~~~~~~~~KNIFE ROUND~~~~~~~~");
                    j++;
                    System.err.print("THis has been displayed:"+j+"Times");
                    
                }
                
            }
            
        }
        if(n==1){
            int big=a[0];
            for(int y=1; y<a.length;y++){
                if(a[y]<big){
                    big=a[y];
                }
                
            }
            
            System.out.print("Largest #:"+big);
            
            
            
            
        }
        
        if(n==2){
            int henry;
            Arrays.sort(a);
            System.out.println(Arrays.toString(a));

// System.out.println()
        //      System.out.println((0));
            }
        if(n==4){
            System.out.print("Enter a number into the array");
            int h= sc.nextInt();
           
            
            
        }
            
            
            
            
            
 
        if(n==3){
            System.out.println("Enter the number that you wish to find");
            System.out.println(a);
            int h= sc.nextInt();
            System.out.println(Arrays.toString(a));
            System.out.println(Arrays.binarySearch(a, h));
            
            
        }
        
        
        
        
        
        
        
        
        
        if(n==10){
            System.err.println("~Thank You Come Again~");
            System.err.print("~Please Donate To Ravi Gandhi Gupta");
        }
        
        
        
    }
    
    
}

thanks for the help.