Find And Remove All Occurrences Of Given Integer And Return Amended Array

Jan 12, 2014

Question - Given an specific integer and an array of integers, find and remove all occurrences of the given integer and return an amended array. I solved it. Here is my solution -

public static void main(String[] args) {
int[] nums = {1, 2, 3, 4, 4, 4, 5, 6, 7, 8, 8, 8, 8, 7, 7, 9};
int input = 8;
int newLen = nums.length;
for(int i=0; i<newLen; i++){
if(nums[i] == input){

[Code] ....

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Method Must Return Int Type - If Given Integer Is Strong Return A / If Not Return B

Sep 7, 2014

I want to use a method, which takes for example an int and also returns an integer. For example, if the the given integer is strong return a, if it is notstrong return b. How would you write that in a Code?

I want to use that in a more general way. I want to give a method mlong the value X of the type date and let it return an int. Type date consists of 3 int, one of them is the int month.

mlong should return an int depending on the X.moth. at the moment my code looks like this:

// File1:
public class date {
public int day;
public int month;
public int year;
}

// File 2:
public class monthlength {
public int mlong(date X) {
int t;
t = X.month;
if (t == 1 || t == 3 || t == 5 || t == 7 || t == 8 || t == 10 || t == 12)
{ return 31; }
if(t == 4 || t == 6 || t == 9 || t == 11)
{return 30;}
}
}

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Count And Return Number Of Times Integer Occurs In Array

Nov 16, 2014

I have problems getting the right number of times for each number of the array. Here is my code:

public static void main(String[] args) {
int[] a = { 3, 13, 5, 9, 13, 6, 9, 13, 2, 3 };
int num = 3;
int count = numbers(a, num);
for (int i = 0; i < a.length; i++) {

[Code]...

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Return Maximum And Minimum Numbers In Elements Of Integer Array

Oct 21, 2014

1. Create a program that will return the maximum and minimum numbers in the elements of ONE-dimensional integer array. Save it as MaxMin_OneDim.java

2. Create a program that will return the maximum and minimum numbers in the elements of each row in a TWO-dimensional integer array. Save it as MaxMin_TwoDim.java

3. Write a program PrintPattern which prompt a user to enter a number and prints the following patterns using nested loops (assumed user entered number is 8 output is:)

1 .... 87654321

12 .... 7654321

123 .... 654321

1234 .... 54321

12345 .... 4321

123456 .... 321

1234567 .... 21

12345678 .... 1

(Without the dots, i just put them to give spaces)

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Accept Array Of Non-negative Integers And Return Second Largest Integer

May 22, 2015

Write a function that accepts an array of non-negative integers and returns the second largest integer in the array.

Return -1 if there is no second largest.

The signature of the function is int f(int[ ] a)

Examples:

if the input array isreturn{1, 2, 3, 4}3{{4, 1, 2, 3}}3{1, 1, 2, 2}1{1, 1}-1{1}-1{}-1 

In the signature what I understood is, I should write my function with the given signature,

The return type is "int"

method name is "f"

parameter is "a" right ?
 
Writing my doubts beside the particular line in the code

public static void main()  // In the answer why they didn't use the class ?

In main method why they didn't use parameters ?(String[] args)

{
a1(new int[]{1, 2, 3, 4}); // what is "a1" here is it array name ? this line initializing the array ?
a1(new int[]{4, 1, 2, 3});
a1(new int[]{1, 1, 2, 2});
a1(new int[]{1, 1});
a1(new int[]{1});
a1(new int[]{});


static int a1(int[] a) // what is "a" here parameter ? and "a1" is method name ? why they used the array name and method name same ?

{
int max1 = -1;
int max2 = -1;
for (int i=0; i<a.length; i++)

[Code] .....

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How To Remove Possible Suffix / Return More Than One Value

Mar 19, 2015

I have a prob with my coding..Here it is :

private boolean chk_akhiran(String pkata) {
String tempkata = new String();
boolean wujud = false, status = false;
{
for (int i = 0; i < akhir + 1; i++) {
tempkata = Suffix[i]; // list of suffix that possible to be removed

[Code] ....

Example : "katakan" will produce "katak" but at the same time possible root word that can be produced is "kata"
in Suffix [i] i have a suffix "an" and "kan"..it's stop when meets suffix "an" bcoz "an" is above "kan" in a list .. How to get another possible root word....

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Code Won't Allow To Remove Integer

May 7, 2014

My program gives me an error when I try to "digUp" the purse. The error appears in the purse class.

import java.io.*;
public class Purse
{
//Fields
public double gp;
public double gold;
public double silver;
public double copper;
public double platinum;
public static final double GOLD_VALUE = 1;

[Code] ....

In the digUpPurse() method, it tells me

java.lang.NullPointerException
null

What this means.

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Count Number Of Occurrences Of A String In Array List?

Apr 6, 2015

I am trying to count the number of occurrences of a string in an array list. I used the following code:

int count = Collections.frequency(strings, search);

strings is the name of the array list and search is the string that I am trying to count the number of occurrences of. My program compiles correctly, but when I enter the string to search for, I get the following error: "Exception in thread "main" java.lang.NullPointerException at java.util.Collections.frquency(Collections.java:37 18)

Why am I getting this error message and how do I fix it?

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Array With Occurrences - Gather Sales Amount For The Week

May 3, 2014

Here is what I'm trying to do using arrays.

gather sales amount for the week
display the total of sales
display the average of sale
display the highest sale amount
display the lowest sale amount

using occurrences determine how many times the amount occurred for the week

make a sales main
make a sales data

This is what i have so far but I'm confused on how to start the occurrence and where it would be placed in order to get the information from the array

public class SalesData {
private double[] sales; // The sales data
/**
The constructor copies the elements in an array to the sales array.
@param s The array to copy.
*/
public SalesData(double[] s) {

[Code] .....

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If Given Integer Is Even Return 1 / If Not Even Return 0

Sep 7, 2014

I want to use a method, which takes for example an int and also returns an integer. For example, if the the given integer is even return 1, if it is not even return 0. How would you write that in a Code?

I want to use that in a more general way. I want to give a method mlong the value X of the type date and let it return an int. Type date consists of 3 int, one of them is the int month.

mlong should return an int depending on the X.moth.

At the moment my code looks like this:

// File1:

public class date {
public int day;
public int month;
public int year;
}

// File 2:

public class monthlength {
public int mlong(date X) {
int t;
t = X.month;
if (t == 1 || t == 3 || t == 5 || t == 7 || t == 8 || t == 10 || t == 12)
{ return 31; }
if(t == 4 || t == 6 || t == 9 || t == 11)
{return 30;}
}
}

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Return Integer That Is The Number Of Strings That Starts With S

Apr 29, 2014

Write a Java code of the method startsWithCount that takes an array of strings words and a String S. The method should return an integer that is the number of strings that starts with S.

For example if:words = { "All", "Arab", "size", "Almond", "Allowed", "here"} and S= "All", then the method should return 2

PHP Code:

public class StringwithCount {
public static void main (String[]args) {
String strings[] = { "All", "Arab", "size", "Almond", "Allowed", "here"};
String output= "";
for ( int i  =  0;  i < words.length; i++) { 
            if (words[i].startsWith("s")) 
                c + +; 
        } 

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Simple Recursion Method - Accept Integer Parameter N And Return Sum Of First N Reciprocals

Nov 1, 2014

I am practicing some basic recursion and I was trying to solve this problem

Write a method sumTo that accepts an integer parameter n and returns the sum of the first n reciprocals. In other words:

sumTo(n) returns: 1 + 1/2 + 1/3 + 1/4 + ... + 1/n

For example, the call of sumTo(2) should return 1.5. The method should return 0.0 if passed the value 0 and should throw an IllegalArgumentException if passed a value less than 0.

This is my attempt to do it , however my output is always a 0.0 , and i do not understand why :

public static double sumTo(int n ){
if(n<0){
throw new IllegalArgumentException();
}
else if (n==0){
return 0.0;

[Code] .....

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Find Sum Of All Selfpowers Of Integer

Jan 12, 2014

This won't compile:

Java Code: import java.math.BigInteger;
class Problem48 {
public static void main (String[] args) {
BigInteger sum = new BigInteger(0);
for(int x = 1; x <= 1000; x++) {

[code]....

All I want to do is find the sum of all selfpowers of integer from 1 to 1000: What is wrong with my code?

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Accept List Of Integers As Parameter And Return Number Of Times Most Frequently Occurring Integer

Nov 20, 2014

Write a method maxOccurrences that accepts a list of integers as a parameter and returns the number of times the most frequently occurring integer (the “mode”) occurs in the list. Solve this problem using a map as auxiliary storage.

If the list is empty, return 0.

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Better Way To Remove Null Values From Array

Dec 1, 2014

Is there a better way to remove null values from an array than what I have tried? This works just fine, but I just get the feeling that there is a better way to do this, without using the JCF.

private static String[] removeNullValues(String[] list){
int count = 0;
for(int i = 0; i < list.length; i++){
if(list[i] == null)
count++;

[Code] ....

I technically dont need to remove the null values for the project that I'm working on (since I just print it out and I can avoid null values with a simple statement like

if(update[i] != null) SOP(update[i])
),

but I'm just curious.

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Algebra - Perfect Square Java Program / Find Smaller Integer N

Sep 22, 2014

Write a program that prompts the user to enter an integer m and find the smallest integer n such that m * n is a perfect square. (Hint: Store all smallest factors of m into an array list. n is the product of the factors that appear an odd number of times in the array list. For example, consider m = 90, store the factors 2, 3, 3, 5 in an array list. 2 and 5 appear an odd number of time in the array list. So, n is 10.)

so far my program is just like this.

import java.lang.Math;
import java.util.Scanner;
public class PerfectSquare {
public static void main(String[] args) {
Scanner m = new Scanner(System.in);
int Fint;

[Code] .....

how do i make the program find the smallest integer n?

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Remove Duplicate Elements In Array Using With Java

Apr 30, 2014

remove duplicate elements in array using with java

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Accessing Indexes Of One Array And Add Them To Another Integer Array?

Aug 10, 2014

How can I access the index of one character array and store those indexes into another array? I need this array of indices so as to perform an addition with another array.

Suppose I have a char array that stores all the letters of the alphabet (say alpha) and I have an another char array (say letter) that contains some letters in it. I want to retrieve those letters from the "letter" array and check its index in the "alpha" array and store that index into another integer array.

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Create 2D Array Out Of CSV File And Find Number Of Elements To Determine Array Size

Mar 24, 2015

I am taking the Class Algorithms and Datastructures and got an assignment for Lab that really throws me off. The goal is to create an Array out of a given CSV file, implement several Methods that get the size of array, etc.

I am still stuck in the first part where the CSV has to be imported into the Array. My problem is that I need a mechanism that figures out the needed size for the Array, creates the array, and only then transfers the data from the CSV.

The list consists of the following wifi related values:

MAC-Adress, SSID, Timestamp, Signalstrength.

These are on the list, separated by comma. The Columns are each of these, and the rows are the four types of values making up the information on a certain wifi network.

The catch is, we are not allowed to use any of the following:

java.util.ArrayList
java.util.Arrays
and any class out of java.util.Collection.

So far I used the BufferedReader to read in the file and tried to implement the array, but I get an arrayindexoutofboundsexception.

Below is my Code (Its still an active construction zone):

public class WhatsThere {
public WhatsThere(String wifiscan) throws IOException {
}
public static void main(String[] args) throws IOException {
// WhatsThere Liste = new WhatsThere(String wifiscan);
String[][] arrayListe = new String[0][0];

[Code] ....

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Return Lowest Value From Array

Aug 12, 2014

I am trying to return the lowest value from the array. having trouble trying to capture the return value by placing it into the variable ..

int myLowest = getLowest(yourNumbers); and then printing out myLowest

import java.util.*;
public class numArrays
{
public static void main(String[] args){
int numbers;
int[]yourNumbers;

[code]....

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How To Return Sum Of Multidimensional Array

Nov 21, 2014

what would the return be for adding two array's together,

public static int sum (int[][] a, int[][] b) {

int[] [] c = new int[a[0].length][b[0].length];
for (int i=0; i< a.length; i++){
for (int j=0; j<a[i].length; j++){
c[i][j] = a[i][j] + b[i][j];
}
}
return c[i][j];
}

My return is wrong...... I know, Any hints?

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Return Value From Array To Main

Mar 11, 2014

I want to return values from arrays to the main and the problem is i cant use my variables from my constructor, I use new variables in my functions and i know this is no good, when I used the variables from the constructor in my function. I have a compilations errors,also i want to create un object in main and with this object i want to call the functions.

Java Code:

package javaapplication4;
import java.util.Scanner;
public class JavaApplication4 {
public static int[] MyInt;
public static double[] MyDouble;
public static String[] MyString;
public static char[] MyChar;

[Code] .....

The code is working when i run it and i have the right result in my screen but i know this is all wrong with the variables.

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Error When Trying To Return Array Via Method

Jan 14, 2014

I am getting these errors with this code, I can not figure why this error is occuring.

what is the issue with this code?

Java Code: package ABC;
import java.util.ArrayList;
import java.util.Scanner;
public class GetInputFromUser {
private ArrayList<String> name = new ArrayList<String>();

[code]....

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Return Array Contain All Object Name Of A Class

Mar 16, 2014

I need to return all the object name of one class in an array. I have a class named country, and other classes with athletes and medals etc. I need to do a method that list an array with all the countries that participate, so all the objects created with the class country (i.e canada.country, usa.country, etc). Is there a way I can retrieve them?

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Return Array Containing All The Object Name Of A Class

Mar 16, 2014

I need to return all the object name of one class in an array. I have a class named country, and other classes with athletes and medals etc. I need to do a method that list an array with all the countries that participate, so all the objects created with the class country (i.e canada.country, usa.country, etc). Is there a way I can retrieve them?

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Return Location And Value To Two-dimensional Array

Jan 14, 2015

I need to design a class named Location for locating a maximal value and its location in a two-dimensional array. The class should contain public data fields row, column, and maxValue that store the maximal value and its indices in a two dimensional array with row and column as int type and maxValue as double type.

I need to write the following method that returns the location of the largest element in a two-dimensional array:
public static location locateLargest(double[][] a)

The return value is an instance of Location. Write a test program that prompts the user to enter a two-dimensional array and displays the location of the largest element in the array.

Here is what i get when I run

Enter the number of rows and columns of the array:
3 4
Enter the array: 23.5 35 2 10
4.5 3 45 3.5
35 44 5.5 9.6
The location of the largest element is at 00
The location of the largest element is at 01

But I need it to display this instead.

Enter the number of rows and columns of the array:
3 4
Enter the array: 23.5 35 2 10
4.5 3 45 3.5
35 44 5.5 9.6
The location of the largest element is 45 at (1,2)

public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Number of rows and columns: ");
int row = input.nextInt();
int col = input.nextInt();

[Code] ....

Enter the number of rows and columns of the array:
3 4
Enter the array: 23.5 35 2 10
4.5 3 45 3.5
35 44 5.5 9.6
The location of the largest element is at 00
The location of the largest element is at 01

I need it to display this instead.

Enter the number of rows and columns of the array:
3 4
Enter the array: 23.5 35 2 10
4.5 3 45 3.5
35 44 5.5 9.6
The location of the largest element is 45 at (1,2)

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