Nested Patterns Using For Loops

Feb 9, 2015

i want to use nested loops to print patterns but i cant seem to make a pattern that will look like V and K this should be the outcome.

* *
* *
* *
* *
*

@ @
@ @
@@
@ @
@ @

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Using Nested Loops In A Class Called Print Patterns

Mar 7, 2014

Write a method to print each of the following patterns using nested loops in a class called PrintPatterns. The signature of the methods are:

public static void printPatternX(int size) //'X' from 'A' to....., size is a positive integer.

#
##
###
####
#####
######
#######
########

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Making Patterns (Diamond Shape) Using Nested Loops

Mar 23, 2015

I have to make a pattern that is of a diamond shape such as this:

Java Code:
1
1 2 3
1 2 3 4 5
1 2 3
1
mh_sh_highlight_all('java');

I wrote this (for the variable name, this is just a small part of my program and I'm trying to get the pattern right so I didn't mind my variables at the moment):

Java Code:

public class NewFile{
public static void main(String []args){
int k = 0;
for (int i=1 ; i<=5 ; i++) {
{ for (int h=2 ; h >= i ; h--)

[Code] ....

My output is the following:

Java Code:
1
123
12345
1234567
123456789
mh_sh_highlight_all('java');

I realize I should divide the code into a lower and upper triangle using two loops. However, I don't know how to break the first part. I did find the "trend" but I don't see how to implement it.

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Nested For Loops

May 15, 2014

how a nested for loop increments the outer loop and then the inner loop and then when it runs the inside code.I've ran the program a few times but I'm just not understanding it, need little narrative to it?

for(int i=0; i < 5; i++){
System.out.println("i - " + i);
for(int j=0; j < i; j++){
System.out.println("j - " + j);
count++;
}
}

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Nested Loops Or Set Operations?

Oct 10, 2013

Is there any advantage to using Java's operations defined in sets or collections over inspecting in nested for-loops?

For example, suppose I want to keep items from one array that do not appear in another, I could do:

for( PrimitiveType prim_1 : someArray ){
for( PrimitiveType prim_2 : otherArray ){
if( prim_1 != prim_2){
///put in some return list
}
}
}

Or else I could do:

ArrayList<NotPrimitive> excludedElements =
new ArrayList(Arrays.asList(primitiveArrayToExclude));
for( PrimitiveType elem : someArray){
if( ! excludedElements.contains( elem ) {
//put in some return list
}
}

I personally see no improvement in legibility nor any reduction of error potential.....

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Displaying Pattern - Nested For Loops

Jan 24, 2015

Write a program that will display the following pattern.

$$$$$$$$$$
$$$$$$$$$
$$$$$$$$
$$$$$$$
$$$$$$
$$$$$
$$$$
$$$
$$
$

I need to write a program that uses nested for loops to display that patter but I have no clue on how to do it....

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Line Spacing - Nested For Loops

Sep 21, 2014

I am having a problem understanding line spacing. I need to write a program that has nested FOR LOOPS to produce the following output:

1
2
3
4
5

I can get a for loop that counts down. The problem I have is using for loop for line spacing. How a for loop for a line works.

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Nested FOR Loops For Rows And Columns

Apr 21, 2014

I need to write a class,that will give me output like this:

*
***
****
***
*

I have to use for loop,i know that i have to use nested for loops, for rows and columns. I just cant figure it out the thing with spaces,and how to turn it to count back.

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Create A Checkerboard Pattern With 2 Nested For Loops?

Feb 12, 2015

Im trying to create a checkerboard pattern with 2 nested for loops . I need to output asterisk characters. Im supposed o use an n int so I dont know if im limited to that 1 int. Im only getting 1 line of asterisk.

* * * * *
* * * * *
* * * * *
* * * * *
package checkerboard;
public class Checkerboard {
public static void main(String[] args) {
for (int row = 1; row < 6; row++){
System.out.print("* ");
for (int col = 6; col < col; col++) {

[code]...

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Demonstrate Two Dimensional Array - Nested For Loops

Feb 4, 2015

Java Code:

// Demonstrate a two-dimensional array
class TwoDArray {
public static void main(String args[]) {
int twoD[] [] = new int[4] [5];
int i, j, k = 0;

[Code] .....

Output:

0 1 2 3 4
5 6 7 8 9
10 11 12 13 14
15 16 17 18 19

(1) I don't understand how repeating the loop creates the structure of the output. Taking the second loop away and putting the "System.out.print(twoD[i] [j] + " " );" under k++ creates the output to print a number on each line. How do I write the code not having the second loop, assigning k to each value that is moved through the grid then printing it out but having the output the same?

Java Code:

for(i=0; i<4; i++)
for(j=0; j<5; j++) {
twoD[i][j] = k;
k++;
System.out.print(twoD[i] [j] + " " );
System.out.println();
} mh_sh_highlight_all('java');

(2) I don't understand why you can't put a new line sandwiched between the first for loop

Java Code:

for(i=0; i<4; i++)
System.out.println();
for(j=0; j<5; j++) {
twoD[i][j] = k;
k++; mh_sh_highlight_all('java');
It compiles, but I get the message:

" Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 4
at TwoDArray.main(TwoDArray.java:11) "

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Nested For Loops - Determine If Inputted Integer Is Even Or Odd

Sep 29, 2014

So I cant figure out why my output for my for loop isn't working properly. So the output for the square comes out right but the for loop isn't working properly for the H. I have tried to figure it out and it should go to the next line but its not.

import java.util.Scanner;
public class Random
{
public static void main(String [ ] args)
{

[Code] ....

Output

Enter a positive odd integer: 5

Square:
*****
* *
* *
* *
*****

H:
* *

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How To Use Nested Loops To Print Out A Letter Pattern Wraps From Z

Jan 6, 2015

//method class
import static java.lang.System.*;
public class TriangleFive
{
private char letter;
private int amount;
public TriangleFive()
{

[Code]...

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Nested For Loops And Strings - Take A String As Parameter And Store It In S

Oct 11, 2014

Question: 1. Declare and implement a class named Substrings. The class will contain the following data members and methods:

Data members:
string S

Methods:
setS() take a string as a parameter and store it in S
printSub1(), printSub2(), printSub3(), printSub4() print all substrings of S. If S = "abcd",

printSub1() will print "a", "ab", "abc", "abcd", "b", "bc", "bcd", "c", "cd", "d",
printSub2() will print "abcd", "bcd", "cd", "d", "abc", "bc", "c", "ab", "b", "a",
printSub3() will print "a", "b", "c", "d", "ab", "bc", "cd", "abc", "bcd", "abcd", and
printSub4() will print "abcd", "abc", "bcd", "ab", "bc", "cd", "a", "b", "c", "d".

Alright so after doing some googling and watching tutorials I managed to put together the first two but I still don't exactly understand how nested for loops work, however just a single loop I do understand.

Secondly, the 3rd and 4th prints are completely destroying my brain using for loops, which we are supposed to use. Check out my code below, also keep in mind the 3rd is giving errors and the 4th i had to revert back to the same as the first print temporarily because my code because so messed up. How to understand nested for loops better.

[code=Java]

import java.util.Scanner;
class subString {
String S;
void setSubstring(String SS) {
S = SS;

[Code] .....

Compiling: error for myS.printSub3 and myS.printSub4 is the same as 1 because i had to revert it after ruining the code.

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Iterative Statements / Writing To Files / Nested Loops

Dec 2, 2014

So basically i have to read from a text file and get some information back from that and print to screen. Im quite confused and im not sure what loop i should use first to scan the text and receive certain information back?

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Nested For Loops - Check If There Is A Duplicate Element In The Array

Aug 4, 2014

Nested for-loops always throw me in a loop.I found a snippet that uses 2 for-loops to check if there is a duplicate element in the array:

/*
* brute force way of checking if array contains duplicates in Java comparing each elements to all other elements of array complexity on order of O(n^2) not advised in production
*/
public static boolean bruteforce(String[] input) {
for (int i = 0; i < input.length; i++) {
for (int j = 0; j < input.length; j++) {
if (input[i].equals(input[j]) && i != j) {
return true;
}
}
}
return false;
}

Let us say we have:
String[] input = new String[] {"one","two","three","one"}

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Print ASCII Image Using Nested For Loops - Reverse Iteration?

Oct 6, 2014

I'm writing a program to print an ASCII image using nested for loops. The output is a rocket ship that looks like this.

/**
//**
///**
////**\
/////**\
+=*=*=*=*=*=*+
|../..../..|
|.//..//.|
|//////|
|//////|
|.//..//.|
|../..../..|
+=*=*=*=*=*=*+
|//////|
|.//..//.|
|../..../..|
|../..../..|
|.//..//.|
|//////|
+=*=*=*=*=*=*+
/**
//**
///**
////**\
/////**\

I'm having problems with the mid section of the rocket, specifically the bottom part of the mid section:

|../..../..|
|.//..//.|
|//////|

I'm having difficulty writing the for loop to correctly print the dots. You're supposed to incorporate a constant which allows you to adjust the size of the overall figure. The loop doesn't work when I adjust the size, only when the value of HEIGHT is 3. The loop, however, for some reason works with the top part of the mid section.

This is the for loop for the top section.

for (int dots = 1; dots <= -1 * line + 1 * HEIGHT; dots++) {
System.out.print(".");
}

This is the for loop for the bottom section.

for (int dots = -1 * line + 1 * HEIGHT; dots <= 1; dots++) {
System.out.print(".");
}

Usually reversing the iteration of the loop just requires flipping the conditions, right? But it didn't work this time for some reason. Why this doesn't work? I can post the code to my entire program for compiling.

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Average Rainfall Main Class Using Nested For Loops Input Validation

Feb 23, 2014

When input validation for the first months rainfall is non-negative, this results in correct average rainfall.

When input validation is used for the first months rainfall I'm prompted to input a positive number, which is 2.

When asked to input rainfall, in inches, for each month, I begin with input -3, I am again prompted to re-enter a positive, I enter 3. What happens is, whichever positive integer I input after I had entered a negative for the first months rainfall, the average would be off by the positive number inputted.

package averagerainfall;
import java.util.Scanner;
public class AverageRainfall
{
public static void main(String[] args)
{
int maxYears;
int totalMonths;

[Code] ....

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Populate Array Using Nested Loops With Letter From A Until Y And Display Array To Screen

Nov 15, 2014

We were given a class lab that asks us to write a program that create a multidimensional array ( 5 x 5 ), populates the array using nested loops with letter from A until Y, and displays the array to the screen. and the result should look like this:

A B C D E
F G H I J
K L M N O
P Q R S T
U V W X Y

How to write this program.. I have tried all my best but the results are not coming like this..

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Java Design Patterns

May 9, 2015

we have been given a scenario to design a system in which we have to make the class diasgrams. however we have to use appropriate patterns that match the scenario.

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Compare Inheritance And Design Patterns?

Apr 30, 2014

Design Patterns are one form of reuse. so is inheritance. what are the similarities and difference between them?

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Design Patterns And Java Algorithms

Nov 22, 2014

I've looked over the concepts of Java programming, tested them in code and i understand most of them. I have a problem when i need to make harder programs , this might be because i dont know design patterns and algorithms.I'm curious what a entry level programmer needs to know to get a job in the field. Right now i was thinking i need to know:

1. The way all big concepts work and most of the keywords.

2. Design patterns.

3. Algorithms.

what i actually need to know for an entry level job and can you tell me which design patterns and algorithms are a must know for that first job. Considering i might have financial problems in the near future this is not a theoretical question, i really need to know what i need to learn in the next 2-3 months to get an entry level job down.

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EJB / EE :: Design Patterns - Usage Of Transactions And Exceptions

Feb 3, 2015

When it comes to Java EE I see many developers having trouble with the usage of transactions and exceptions and when to use what.

I see a full chapter of RESTful Web Services, but do you also relate these Web Services to their counterparts (SOAP Web Services)?

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EJB / EE :: Difference Between Inversion Of Control And Dependency Injection Patterns

Feb 4, 2015

My question is regarding the the Inversion of Control (IoC) and Dependency Injection (DI) patterns, when learning about Spring i saw that people keep talking about Ioc and Dependecy Injection like if its the same thing!

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Stripes / Checkerboard And Double Diagonal (Asterisk Patterns)

Oct 2, 2014

I need to make a program that does stripes, checkerboard, and double diagonal. I can not get the stripes to work?

import java.util.Scanner;
public class AsciiArt {
public static void main(String[] args){
int pattern;
Scanner input=new Scanner(System.in);
System.out.println("Choose one of the following patterns by pressing the corresponding number");
System.out.println("1) Stripes");

[Code] ....

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JSP / JSTL :: What Is The Difference Between Design Patterns And Frame Word

Feb 20, 2006

what are design patterns ? what is the difference between design patterns and frameword ?

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Using Factory And Singleton Design Patterns To Create A Simple Form

Nov 16, 2014

My assignment was to create a simple form that demonstrates the use of the factory and singleton design patterns. "Use the Factory pattern to ensure that each form input consists of a text label and a textfield. Use the Singleton pattern for the submit button. When the submit button is clicked, a pop-up should show all the information that was typed into all of the form fields."

I used JFrame to create the form without the design patterns and I although I get the desired result, I'm not quite sure how I can integrate the design patterns into the code I wrote. The example I have to go off uses shapes, not text fields so I think that's why I'm not quite clear on how to approach this.

Here's my code so far:

import javax.swing.event.*;
import javax.swing.*;
import java.awt.*;

[Code]....

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