How Many Numbers In Array Have Value Greater Than Or Equal To 100
Sep 10, 2014
I have an assignment that wants me to write a Java function based on induction to determine how many numbers in an array have a value greater than, or equal to, 100.
I have started with:
Java Code:
int recurseHundred (int [] A, int n) {
//n is the number of elements in the array.
//Base case:
if (n == 1 && n >= 100) return A[0];
//Recurse
int num = recurseHundred(A, n-1);
if (n-1 >= 100) return A[n-1];
else return num;
} mh_sh_highlight_all('java');
I would like to create a program that takes some files and modifies them in this way: The files should contain text formatted in this way:
############## #various comments# ############## something{ identifier=1234 anotherIdentifier=1235 anotherOne=12345 //and so on... }//I need only this
#Comments are sometimes made this way
somethingAgain{ #comments that explains what's below them I:dentifier:something, I, do, not, need #see ^that A:notherIdentifier:boolean //and so on.. }
And I have to make so that the numbers contained in something{} in all the files don't match. I could ask to make so that the input file is only one, and it is formatted this way:
identifier=1234 anotherIdentifier=1235 anotherOne=12345 //and so on...
but I don't know how to do the rest of the program... That's what I've done (the names of the classes, package etc. are in Italian and there's some useless code that NetBeans prevents me from deleting):
package confronto; import java.awt.Color; import java.io.*; import javax.swing.*; public class confrontoTesti extends javax.swing.JFrame {
I have an 46x9 array. I only have 108 values in the array for which I need to perform preliminary computations. How do I get the read to only read the 108 values whose values are greater than 0 and skip the other 495 whose values are 0?
I am working on an assignment covering exception handling and am stuck on part of the assignment. How can you test for array length = 0?
When I try something like: if (array.length == 0) on a null array, naturally I get a NullPointerException. I would try something like if (array != null) but both array length of 0 and null array are supposed to throw different expressions.
i know that int [][] x = new int[2][2] will generate a 2x2 array but I'm looking at a certification mock question and I see double [][] da = new double [3][]. What is the empty [] on the right hand side of the equal sign trying to tell me? Is there some default value?
I need comparing two array lists. For this program i am comparing 2 array lists. The list is integers entered by the user the second is random generated numbers. So far in my program i am able to compare the 2 arrays together and output if they are equal or not however i need the program to output even if atleast one if the integers match,
EXAMPLE list one: 1, 2 ,3 ,4, 5. LIST TWO: 1, 3, 3, 3, 3.
Since the first number matches i want it to out put there is one match, so on and so forth with if there are 3 or 4 matching integers. here is my code so far.
public static void main(String[] args) { final int NbrsEntered = 5; //Number of guessed numbers entered final int LOTTOnbr = 5; int[] numbers = new int[NbrsEntered]; int[] randomNum = new int[LOTTOnbr]; //int[] TestArrayOne = { 1, 2, 3, 4, 5 }; //int[] TestArrayTwo = { 1, 2, 3, 3, 5 }; boolean arraysEqual = true; int index = 0;
I am trying to print a loop inside an array of a greater size than the loop itself. Like for example I have an array of size 7 but it has only 3 elements.
now what I want to do is print these three numbers in a loop so that my array[3]=2;array[4]=3;array[5]=4 ...... till the last one. Also the array could be any size and not just 7.
I've just written a program that generates 100 numbers that range from 0 ~ 25 using arrays, the program calls another method that sorts the even numbers into a separate array and returns the array. I need it to display both arrays, however, when I run my program, the numbers of both arrays are mixed together, and I'm not sure how to separate them.
[ public class Array1 { public static void main(String[] args) { int array [ ] = new int[100]; for (int i = 0; i < array.length; i++) { array[i] = (int) (Math.random() * 26);
I need to write a java program to find the index of the element whose value is the sum of the remaining elements. Recently I have been asked this question in an Interview which I couldnt solve properly.
Write a program that prompts the user for an input number and checks to see if that input number is greater than zero. If the input number is greater than 0, the program does a multiplication of all the numbers up to the input number starting with the input number. For example if the user inputs the number 9, then the program displays the following sum:
9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1 = 362880
That's the question I'm getting and so far all I've got is
import java.util.Scanner; public class Lab4Q3 { public static void main (String[] args) { int keyboard;
I think I fixed the first error, but now I'm receiving another error in my Net Pay print statement at the end.
Here is what I'm supposed to receive:
Net Pay: 599.86
Here is my sample run:
run-single: Enter hourly rate in dollars and cents --> 27.16 Enter number of hours and tenths worked --> 37.9
PAYROLL REPORT Rate: 27.16 Hours: 37.9
Gross Pay: 1029.36 Federal Tax: 257.34 State Tax: 93.41 FICA: 78.75 Net Pay: 771.86
Employer's FICA contribution: 78.75 Employer's UEI and DI contribution: 20.59 Cost to Employer: 1128.70
Enter hourly rate in dollars and cents -->
Here is my updated code:
package assignmentproject1; /* CHANGE (FINAL) VAR NAMES, SCAN & VERIFY, ORGANIZE AND PUT FORMULAS ON BOTTOM, ORGANIZE VAR @ TOP, */ import java.util.*; public class Project1 { public static void main (String[] args)
I have an object that may contain several other objects (sub-object) and will compress those sub-objects.
My question is generally what is a good way to compare two objects, as described above, if they are equal (e.g. through equals() function)?
Intuitively there are two ways I can think of: 1. Compare each compressed bit
The disadvantage I think is it's not efficient if the object is very big. For instance, when it holds several gigabytes data, it may took too long for just comparing each bit.
2. Hash the sub-object before compressing it, and then compare all hashed values. This problem is I am not very sure if hashing is a good way to compare objects. And if collision may be the problem?
I have a JScrollPane with two coulmns. In the first column I have an image pane JTable, and in the second a list with names of sections. This second column I try to divide in two columns, one (the second column) to display the names of the sections (each row contains one name), and in the other column (the third) I want to show some values for every section in the row respectively. But, instead of displaying the desired values in the third column, I get the same names of the sections as in the second column. Here is a part of the code I have:
private Vector<Section>daten = new Vector<Section>(0); //These are the values for the first column in the Jscroll private String[] header = {"Section","calcGYR"}; // These are the values for the second and third column (in this case the header for the both columns public TrafficObserveModel(Vector<Section> daten) { setData(daten);
[code]....
But I don't know how to modify the methods in order to render the desired integer values in the third column.
I read this tutorial about overriding equal and hashcode method. [URL] ....
I understand how to override equal method, by overriding it, We can custom our compare. I also understand How to override hashcode, To make custom hash.
But still I can not understand why we do it? why if equal method override, we must override hashcode method too?If we don't what is the problem?
To honor the above contract we should always override hashCode() method whenever we override equals() method. If not, what will happen? If we use hashtables in our application, it will not behave as expected. As the hashCode is used in determining the equality of values stored, it will not return the right corresponding value for a key.
Is it the right reason in order to override:
Because when we customize equal method so it focus on special variables,We must change the hash code too in order to match with it, so hashcode also focus on those special variable.
I'm suppose to create a program that will check if one statement is equal to another but it doesnt display the message if its equal to the inputted String
import java.util.Scanner;
public class sup { public static void main (String args[]) { Scanner in = new Scanner (System.in); String one;
[code]...
thats just an example I was able to do it in C++ but it doesnt do what I want in Java
I need to make a code that will ask the user for an array size and the numbers that go in the array. Then it must ask for a new size and copy the numbers from the first array and add numbers to fill the new array.
import java.util.Scanner; import java.util.Arrays; public class Lab07{ public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.println("How many numbers do you want to enter?");
[Code] ....
I can make the first array but I am getting stuck on the second this is what I am getting back
How many numbers do you want to enter? 3
Enter the 3.0 numbers now. 7 1.2 9
These are the numbers you have entered. [7.0, 1.2, 9.0]
How many numbers do you want to enter? 5
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 3 at Lab07.resizeArray(Lab07.java:27) at Lab07.main(Lab07.java:18)
I'd like to be able to sort them so that if I want to search for one of the entries, I can then create a function which allows me to sort them by date or even return all the numbers by a given date or day, etc....
However, I'd like to be able to set it up so that each set is "linked" meaning that again that I can search by date and it returns everything at that date.
Write java program using table that stores celsius and farenheit values that are equal to one another using a loop. use C 0-20 and convert to farenheit.
I have to use doubles for Celsius and Fahrenheit and in the formula. I get a runtime error with the following displayed:
I will display a table of temperatures in their Celsius and Farenheit equivalents.
celsiusfarenheit
import java.util.*; import java.lang.*; import java.io.*; class TemperatureConversion { public static void main (String[] args) throws java.lang.Exception { double celsius;// Temperature in degrees Celsius minimum double farenheit;// Temperature in degrees Fahrenheit
import java.util.Scanner; public class ColumnSum { public static void main(String[] args) { Scanner s = new Scanner (System.in); int userpick = 0; int sum = 0; int [][] matrix = {{5, 9, 87, 74, 12, 7}, // row 1
[code]...
Right now my code gets all the numbers in a row and adds those up, but I want it to get the numbers in a column and add them instead. The problem is I don't know how to get the userpick (the number that the user picks to determine which column gets added) to be set to that particular column.
