Simple Code In Java That Replace All Tabs User Input With Asterisk
Feb 13, 2015
I am creating a simple code in Java that replaces all tabs the user inputs with '*'. However, I am doing something wrong and I am not sure what. Here is what I have so far in Eclipse..
import java.util.Scanner;
public class ReplacingTabs {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
String s = "";
String s2 = "";
[Code] .....
There is an error with the s2 in the line String s2 = s.replace(' ','*');
I think I need to add String s2 to the loop but I am not sure how..
I want to do a simple search and replace regular expression of lines. I am very unfamilar with Java regular expressions, and I'm not sure how to do something as simple as what I want to do. I have lines that look like this...
The reason I want to use regular expressions is because I want to use the replaceAll method of the java.lang.String object. If I use replace I have to convert my strings into char arrays, and my code becomes bulky.
This is the java code that I wrote for a password:
// java application that asks the user to enter a password import java.util.Scanner; //program uses class scanner public class password{ //main method used to execute java application public static void main(String args[]){ //create scanner to obtain input from command window
[Code] ....
here is the output of the code when I run it :
entered the passwordreason Try againPress any key to continue . . .
The code compiles without errors. The problem is when , I entered the actually password that I declared in my code, it doesn't output "You entered the correct password" but it instead outputs "Try again", which is supposed to be the output if you've entered the incorrect password. What did I do wrong?
InputStream inputStream = null; OutputStream outputStream = null; try { URL url = new URL(imgfm); inputStream = url.openStream(); outputStream = new FileOutputStream(imgto); byte[] buffer = new byte[2048]; int length;
[Code] ....
I have several pic to download (e.g 30) however, the code work for some pic (workable for a random number of pic, sometimes workable for 10 pics but sometime can only download 1 pics).
I try to input several println code to found out the problem. finally i found that all the code stop (it's stop as when i use debug process in eclipse, it get no respond) and the final appear code under console is:
I am trying to write a code that allows a user to input the number of stones in a basket, then put the stones in my pocket, after the stones are in my pocket, the stones must be taken out, one by one, and thrown in a pond. I get stuck at this part because my for statement has to subtract the number of stones in my pocket (one at a time) and add a stone to the pond (one by one) at the same time.I can get the pond stones to increase until the max amount of stones with the following:
how to reduce one and add to other. Is it possible to do this in one for statement? I tried to put stones-- in place of the question mark, but that is not working.
I worked on this simple client server chat app and it worked now for my project i needed to work on client server audio streaming broadcast but i dont really know much bout audio api and methods on java...
Write a java program that will ask a user to input grades until the user inputs the sentinel value -1. The program should test each input to determine whether 0<=grade<=100. If the grade entered is within this range, the program should print "Grade accepted;" if not, the program should print "Invalid input".
With my code the menu runs. But when the user has typed in the name of a fruit (to reserve it) I'd like it to say 'Reserved' when the user then presses 'V' (to go and view all fruit)I have read Oracle Java Collections Arraylist and from my understanding I either have to code using the get method or equals method but I'm not too sure how to (I did try though)
import java.util.ArrayList; import java.util.Scanner; public class FruitApril { public static void main(String[] args) {
URL....So the problem is that when I type in "PA" it will display about 24 Zips and Populations before it stops. The problem is in the ZIPs file. It goes down the list and then takes the Zip from the Zips file to the Zips in the Population file and displays the Population. It will go to population 513 and stop. Reason being, there is no ZIP code in the Population file to display a population. The loop then stops. How can I get the program to skip over the zip code when there is no corresponding ZIP code in the other file and continue showing the other Pops..Here's what I currently have completed:
import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner; public class Population { //Declaring global variables. Scanner fileScannerZip, fileScannerPop, inputFile; private String lineZip, linePop; int invalidZip;
I need to create a Java program that takes an input a color code in HSV and outputs the equivalent RGB code and Vice versa.
Example: If you test on the color RED in RGB: Input: (255,0,0) Output: (0,100%,100%) If you test on the color RED in HSV: Input0,100%,100%) Output: (255,0,0)
I am designing a program in-order convert Binary to Decimal values with added features:
Rejecting binary values longer than 32 bits
Prompting the user to make multiple entries after completing the binary to decimal conversion of their first entry. I was trying to code this in Nested For Loops, but I don't know if I've really done that.
Here is what i have so far.
public class BinaryToDecimal { public static void main(String[] args){ Scanner scan = new Scanner(System.in); String binary; int decimal=0b10, i, rem; boolean isBinary = true;
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 am doing a project to generate three names of fruits. When I take out my switch code the numbers generate randomly, but when I added the switch code back I kept getting three instances of "Bars" as if the random numbers all became 5.
public static void main(String[] args) { System.out.println("Enter the amount of money you would like to gamble."); Scanner keyboard = new Scanner(System.in); int num1; int num2; int num3; int money; money = keyboard.nextInt();
I am trying to write a program that will generate a QR Code from an input text and also display some information about the input/output bits. So far I have created the frame and what to do next. And I'm not sure if I am on the right track since my level of programming is not that great. By the way, I am using zxing libraries from GitHub. I know, there are plenty of generators online for the QR Code, but that is not what I am looking for. As you can see on the attached image, I am more interested in the efficiency of encoding 2D data. Also, I noticed that almost all the online projects regarding 2D codes are for Android. Which is not very useful.
Write a Java program that randomly generates a five-digit lottery number and prompts the user to enter a five-digit number. Each digit in the number is in the range between 0~9. The program should determine which prize the user wins according to the following rule:
• The user wins the first prize if the user input matches all five digits in the lottery number in exact order. • The user wins the second prize if the user input matches any four digits in the lottery number in exact positions. • The user wins the third prize if the user input matches any three digits in the lottery number in its exact position. • The user wins the fourth prize if the user input matches any two digits in the lottery number in its exact position. • The user wins the fifth prize if the user input matches any one digit in the lottery number in its exact position.
and here is my code. I cant get it to print the right statements.
import java.util.Scanner; import java.util.Random; class Hw5 { static int getPrize(int g1, int g2, int g3, int g4, int g5, int u1, int u2, int u3, int u4, int u5) { //code for determining the prize comparing (g1, g2, g3, g4, g5) to (u1, u2, u3, u4, u5) if (u1 == g1 && u2 == g2 && u3 == g3 && u4 == g4 && u5 == g5)
I'm trying to figure out the correct way to replace number into letter. In this case, I need two steps.
First, convert letter to number. Second, restore number to word.
Words list: a = 1, b = 2, f = 6 and k = 11.
I have word: "baafk"
So, for first step, it must be: "211611"
Number "211611" must be converted to "baafk".
But, I failed at second step.
Code I've tried:
public class str_number { public static void main(String[] args){ String word = "baafk"; String number = word.replace("a", "1").replace("b","2").replace("f","6").replace("k","11"); System.out.println(word);
[Code] ...
Result for converting to number: baafk = 211611
But, result for converting above number to letter: 211611 = bkfk
How to distinguish if 11 is for "aa" and for "k"? Do you have any solutions or other ways for this case?
I have been struggling with this program for weeks. This program is supposed to take a user's inputted odd number and then print out all prime numbers lower than that number.
public class PrimeNumber { Scanner scan = new Scanner(System.in); int userNum; String neg;
I am making a very simple 2D array game where the player is asked what size they would like the game board to be. After entering, it displays the board and the player 'P' starts at index [0][0]. After that, they are asked for an action, which can be "up", "down", "left", "right", or "exit". I will be including some extra later (like a treasure at the end, or random obstacles), but for now this is what the game consists of.
I was instructed to "do nothing" when/if the player attempts to go out of bounds. I am trying to simply print an error, such as "Out of bounds! Try again.", then prompt the player again for an action. I even tried to make a boolean method to catch it, but to no avail.
I don't want the exception to occur at all. I just simply want the error message to print to the player and ask for another action. I would prefer not to use try/catch, or try/catch/finally since I already tried that and it still gave the exception error.This program consists of two classes. I will show the class containing the main first, then the client-server type class second.
import java.util.Scanner; public class Driver { public static void main(String[] args) { World world = new World(); boolean keepPlaying; keepPlaying = true; boolean isOutOfBounds; isOutOfBounds = false; int height = 0; int width = 0; int x = 0; int y = 0;
