32,199 Topics
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| | How to get current user connected to a Liferay portal with the help of simple Java code ?  |
| | I am working on a program which takes a text file as input and stores each word in a hash table along with a count of how many times the word occurs in the text. It seems to work fine until I attempt a file with more than 18 words, … |
| | I am making a string array so user can type whatever they want. the problem the code i have below user can enter &, alt, up, @, in string array. I want user to enter letters and numbers only, and 1st char has to be letter. I couldnt find any … |
| | import java.io.*; public class t1 { public static void main(String a[]) { int i; char c='a'; char[] ch={'a','b','c'}; for(i=0;i<3;i++){ System.out.println(ch[i]+" "); } //String s=c.toString(); //char cant be dereferenced String s=ch.toString(); System.out.println(" S : "+s); } } Q-1) I am getting an error while converting a character array to String aoject. … |
| | i wanted my program to show up in a Jframe the code reads the pixel color i want the frame to display red= pixel color blue= pixel color and green= pixel color and how would you make the background color of the frame change according the mouse movement for example … |
| | i have two classes. Main class and tester class. I have to create a textfield so your can enter there name. The problem is that in tester class i am getting error on add() method. is there simple fix for this? i want to create the textfield in tester class … |
 | Hi, I downloaded CDT 8.0.2 for Indigo and installed it through help->install software. But in right click on project->properties, I can't see C/C++ build option in the properties! What happened! |
 | Hi guys, I am not sure this is right or not. If I have one variable whose value is true or false and I want to use it in an if statement I could easily do if(variable1){ //do this and that } but I want to check 2 variables I … |
 | Alright so I am still kinda new to java I am working on a lottery program that will ask the user how many tickets they would like (default being five) and each ticket has a random set of numbers plus a jackpot number: this is the code have so far... …  |
| | Well i'm having trouble with this code with the following lines: return new AccountID(this); return new Customer(this); ^These two from the clone method. Customer myCustomer = new Customer(newBank.Find(myAccountID)); ^Not sure what i'm doing wrong here, it is on 4 different methods of deposit, withdrawal etc. Not only that, but my … |
 | Hi...! i wan to write a program that when i give it a number and a string it replace string with length=number to "1,2...,n" but its replace part doesn't work! this is the code: package fasle5; import java.util.Scanner; public class Tamrine8 { public static void main(String args[]){ System.out.println("Enter N:"); Scanner … |
| | hey guys this is the question compile shuffleUniqueRandomNumbers.c and run the exe file to generate n number of random numbers. The program asks for three (3) parameters: generated number, lower bound and output file name. For example if you input 100 as generated number, the program will generate 100 numbers …  |
| | I am getting an error when I run my program that says: Exception in thread "main" java.lang.NullPointerException at defaultpackage.GradeBook.setName(GradeBook.java:25) at defaultpackage.GradeBookDemo.readFromFile(GradeBookDemo.java:52) at defaultpackage.GradeBookDemo.main(GradeBookDemo.java:23) I've looked through my program and cannot figure out what is actually wrong. The first class is GradeBook and the second is GradeBookDemo. I have to use … |
| | How would I make an Image work like a button? I need it for a yahtzee game. I want it so that after i roll the die and the image is displayed i want to be able to select the die i wish to keep and then re-roll the ones … |
| | Hi, when I started to look into programming, one of the things I remember many programmers are quite keen on are setters and getters. I totally understand the importance of them but there is one thing that isn't really clear to me. If I have a class with some private … |
| | Chaps, I am having some problems with a return statement in a function. I have this situation: public boolean isFine(){ for( int i = 0; i < myarray.length; i++ ){ for(int j = 0; j < myarray[i].length; j++ ){ if( myarray[i][j] == myEnumeration.FRIDAY ){ return false; } else{ return true; … |
 | Hiya, I am new to java, I have a very fast paced class and I am learning as much as I can as quickly as I can. I have previous experince with C++ but it will not help here. My Question: **WHY WILL MY PROGRAM NOT RUN!!??** *It compiles and … |
| | Chaps, sorry I have a silly question. I am not quite sure if this is right, but what is the differenct between the two below: public class myclass{ public static void main( String args[] ){ boolean variable1 = false; boolean variable2 = false; ... System.out.print(variable1 + " and " + … |
 | Hey Guys, I am working on a search that takes in a value via textfield. Once taken in it should display another Jframe with the info but the searchbox crashes the second I run it. Its some stupid mistake I have made or i have gone about it the wrong … |
 | `**when we write a program in java main() will be executed first why?**` |
| | i created a testScores class which initialized an object with an array of scores and had an exception that if the score was <0 or >100 it would throw an IllegalArguementException. I got my main program to work it throws the exception for the array with the bad grade in … |
 | /** Saadman's ISU **/ import java.io.*; import java.util.*; public class ISU { public static void main (String[]args) { //Keyboard Initialization Scanner kbin = new Scanner(System.in); //Variable Inititialization & Declaration; String list[] = new String [21]; int price1 = 30; int price2 = 20; int price3 = 25; int price4 = … |
| | Hi, help me to configure (hibernate + mysql + xml) in eclipse, I am getting errors while following the sites when i got them in google seach thanks for your time  |
 | Hi I am working on a project on writing our own huffman coding. I am currently having trouble writing the binary 1's and 0's to an output file. It works with smaller input files but for very large files it does not write anything out to the output file. The …  |
| | i am trying to make a breakout game where you have a paddle and ball bounces around breaking bricks. the problem is that if ball touches the corner of player(cyan paddle). than it goes inside of player. i could not understand why. only thing it might be bc of all … |
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| | package Assignments5; import java.util.*; public class Question5 { public static void main(String[] args) { int[] intArray = new int[8]; int searchValue = 0, index; System.out.println("Enter 8 numbers : "); Scanner input = new Scanner(System.in); for (int i = 0; i < intArray.length; i++) { intArray[i] = input.nextInt(); } System.out.print("Enter a … |
| | package Assignments1; import java.util.Scanner; public class Q5 { public static void main(String[] args) { { int size; Scanner reader = new Scanner(System.in); System.out.println("Enter the size :"); size = reader.nextInt(); int [] grades = new int [size]; int sum = 0; double average; for(int i=0; i<grades.length; i++) { System.out.println("Enter the grades" … |
| | I have the numbers 0-8 so I can represent a state as 012345678 012345687 .... 876543201 876543210 This gives me 40320 ways to represent a state so I have a HashMap of size 40320 and I need a good way to make sure each state only corresponds to 1 key … |
 | i have question how do i can write math in java im confuzed by pithagoric theoromy, limes, geometry etc someone show me some exsample im realy interested how that can be made :) Thanks xD |
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