Removing A Character From String?
Sep 26, 2014
I am trying to remove a character from string as below
public String reomveChar(String str, int n) {
if(0<=n & n<=(str.length()-1)){
//str.charAt(n)
char o=str.charAt(n);
return str.replace("o","");
//a.replace("o","");
}
return null;
}'
what is the best way to remove it.
If i call like
removeChar("hello", 1) i should see hllo.
When there are more than one way to do a challenge in java which one to choose as best way.
What is the criteria to decide one particular way of writing code is best among say 'n' different number of ways.
View Replies
ADVERTISEMENT
Mar 25, 2015
For some reason the following code is not removing whitespace from my string:
temp = sb.toString().trim().replace("s+", " ");
I have printed the string before and after the implementation of the methods above and there is not change in the whitespace of the string.
View Replies
View Related
Feb 28, 2007
I have a string from which I need to remove all of the newlines, tabs, and spaces. Here is the code I wrote:
inputString = inputString.replaceAll(" ", "");
inputString = inputString.replaceAll("
", "");
inputString = inputString.replaceAll(" ", "");
It removes the spaces just fine but not the newlines or tabs. How can I do this?
View Replies
View Related
May 7, 2014
I just need to write a simple program/function that replaces certain letters from a string (i.e. censor( "college", "aeiou" ) returns "cllg"). I'm trying to get the code right first, and then write a function for it.I basically just thought that I would iterate over the first string, and once I had the first character, I would then iterate over the second string, to see if the character exists. I'm getting a "dead code" error on my second loop because I put the second "break."
public class ap {
public static void main(String [] args){
String s = "Hello";
String s2 = "aeiou";
[code]....
View Replies
View Related
Mar 23, 2015
I want to remove all numeric number in String text
String text = She was born in 1964,and now her age is 55;
String delim = ",";
StringTokenizer stringTok = new StringTokenizer(text, delim);
String f1 = "%-40s";
String h1 = String.format(f1, "Token list");
[Code] .....
View Replies
View Related
Apr 6, 2014
I'm not sure why but my infix string isn't removing the spaces. Here is the part of the code:
Scanner s = new Scanner(System.in);
System.out.println("Enter Infix express: ");
String infix = s.nextLine();
infix.replaceAll("\s", "").trim();
System.out.println(infix);
InfixtoPostfix convert = new InfixtoPostfix(infix);
String postfix = convert.toPostFix();
System.out.println("Converted Express: " + postfix);
Is there something I'm doing wrong? Here is the output when I run it:
Enter Infix expression:
(7 + x) * (8 – 2) / 4 + (x + 2)
(7 + x) * (8 – 2) / 4 + (x + 2)
Converted Expression: 7 x+ 8 – 2* /4 x 2++
View Replies
View Related
Nov 23, 2014
I am using a TreeSet to tokenize a string. The output is sorted with numeric first followed by words
E.g. 13 26 45 and before etc.....................
Is there a tidy way to remove the numeric?
Last bit of my code is :-
// print the words separating them with a space
for(String word : words) {
System.out.print(word + " ");
}
} catch (FileNotFoundException fnfe) {
System.err.println("Cannot read the input file - pass a valid file name");
}
View Replies
View Related
Mar 8, 2014
So basically, if a line in a text file contains a certain string, that specific line will be deleted. It should probably be similair to this method?
Java Code:
/**
* Replace text.
* @param replace
* The text to replace.
* @param replaceWith
* The text to replace with.
*/
public static void replaceSelected(String replace, String replaceWith) {
try {
BufferedReader file = new BufferedReader(new FileReader("data/replacer.txt"));
[code]....
View Replies
View Related
Jun 8, 2014
Question 1: I am working on an assignment where I have to remove an item from a String array (see code below). When I try to remove an item after entering it I get the following error "java.lang.NullPointerException." I am not sure how to correct this error.
Question 2: In addition, I am having trouble figuring out how to count the number of occurrences of each string in the array and print the counts. I've been looking at other posts but they are more advanced and I have not yet learned how to use some of the tools they are referring to.
private void removeFlower(String flowerPack[]) {
// TODO: Remove a flower that is specified by the user
Scanner input=new Scanner(System.in);
System.out.println();
System.out.println("Please enter the name of the flower you would like to remove:
[Code] ....
View Replies
View Related
Feb 14, 2014
I'm trying to use the split method to split a string for a calculator, but it keeps throwing this Exception:
Exception in thread "main" java.util.regex.PatternSyntaxException: Dangling meta character '+' near index 0
+
public class exp {
private static String ques="88+12";
private static String [] splitCalc;
public static void main(String[] args) {
splitCalc = ques.split("+");
for(String s : splitCalc){
System.out.println(s);
}
}
}
View Replies
View Related
Mar 7, 2014
String charAt() method returns a particular Character at the specified index in the String.
How is this function implemented internally?. How a particular character can be retrieved from String?.
View Replies
View Related
Sep 28, 2014
I am trying to swap given string first and last character. If I pass world i should get 'dorlw'
I found link and code [URL]....
String str="hello";
char[] charArray=str.toCharArray();
int indexOfLastChar=charArray.length-1;
for(int i=0;i<charArray.length/2;i++){
char temp=chatArray[i];
charArray[1]=charArray[indexOfLastChar-i];
charArray[indexOfLastChar-i]=temp;
}
String reversedStr=new String(charArray)
System.out.println("reversed string"+str+reversedStr);
I wonder Is there is any easy simple way to do it.
View Replies
View Related
Jul 24, 2014
so my task is to write a code which would ask user to input the year as integer and first three letters of the month with first being an upper case letter. Than the program would determine the number of days for given year and month.
Currently I have a brain crash on how to check, if the user has provided the month with first character being upper Case. If not, than the program would automatically correct the character. Problem starts at line 17.
import java.util.Scanner;
public class DaysOfMonth4_17 {
public static void main (String[] args) {
//Initiate scanner
Scanner input = new Scanner (System.in);
//Ask for year input and use is as INT
System.out.println("Enter the year");
[code]...
View Replies
View Related
Oct 16, 2014
the number of occurrences of a specified character in a string...i tried to do the program occurrences in a given string and i tried the code as below.
code:
import java.util.*;
public class Occurrence
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
[code]....
View Replies
View Related
Jun 11, 2014
I have to create a code that can calculate the number of upper case letters in a string that is entered by the user (below.)
Java Code:
import javax.swing.JOptionPane;
public class mainClass {
public static void main (String [] args) {
String userInput;
userInput = JOptionPane.showInputDialog("Enter a string.");
[Code] ....
My issue is that I would like the program to be able to function properly when spaces are entered into the string. As it is right now, I believe it is only processing the first string entered into the input box.
View Replies
View Related
Jul 17, 2014
How I can convert a string into a character array without using toCharArray???
View Replies
View Related
Oct 14, 2014
Which string method to search a particular character in a string whether a particular character is there or not . Suppose my String is like............
String s = "Java.";
How I can find the character " . " in above string "Java." is present or not . What is the string method to search that "."
View Replies
View Related
Aug 24, 2014
What should be the code if i want to input a different string in case of the typed string. The case is : I have a predefined string S = "Peter,please answer my question" and now when i input another string inside the text field character by character i want characters from the string S to enter instead of the input string. In short, the input string should be disguised as string S.
View Replies
View Related
Jul 14, 2014
Now I am doing dictionary app using files..
Here i want to print the String from Starting character which is given by user..Here i given below the image like my concept..here we put .(dot and enter R)eclipse will print the method name which is starting from R..
View Replies
View Related
Feb 7, 2007
import javax.swing.*;
public class mostFrequent{
public static void main(String args[]){
char index;
String s;
s = JOptionPane.showInputDialog("Enter String here");
int currFrequency = 0;
for(index = 0; index<s.length(); index = index++){
int i = 0;
for(i = 'A'; i<='Z'; i++){
if(i==s.charAt(index)){
currFrequency = currFrequency + 1;
}
}
}
System.out.println("end");
}
}
//my code so far
View Replies
View Related
Jan 29, 2015
I have to write some code to take names from the user and then order them in alphabetical order and then print them out which i have managed to do. However, i can't get it to count the characters in the names that the user enters or count the amount of vowels in the names.
This is the code ive written:
import javax.swing.JOptionPane;
import java.util.Arrays;
String[] names = new String[9];
int i;
names[0] = JOptionPane.showInputDialog("Please enter a name");
names[1] = JOptionPane.showInputDialog("Please enter a name");
[code]....
View Replies
View Related
Apr 26, 2014
I have this program to see the occurrences of a character in a string stored in a text file. My text file has the following contents (as shown below):
P-P-N-N-L-V
N-R-U-S-R-Q
K-Q-E-L-E-A
A-J-B-G-E-F
F-E-L-Q-R-R
U-F-J-V-I-M
P-I-Q-K-B-K
U-N-L-F-O-B
M-A-N-M-H-O
P-Q-J-D-N-I
G-U-O-D-F-I
Q-M-M-B-C-Q
N-B-I-L-E-J
S-A-T-Q-H-U
C-L-G-U-J-M
R-P-V-M-A-A
C-R-A-V-L-B
M-U-Q-K-M-Q
E-I-C-H-V-J
J-N-N-K-R-P
As you notice, each character is seperated by a hyphen (serving as its delimiter). I want to only go through 10 lines in the text, instead of all 20 of them. So, I wrote the program in such a way that I intend to reach into the indices of each character in the text file. Since there are six characters in each line so that means there are 6 indices - and there are 10 lines I only want to go through. So, 6 indices times 10 lines equals 60 indices. Hence, there are only 60 indices I need to go through. In that manner, it's like I have gone through only 10 lines through that way.
It compiled perfectly fine but upon running it, I ran through an error in the black DOS screen that says
"java.lang.ArrayIndexOutofBoundsException: 6 ".
How do I work around that?
The code I wrote is shown below...
import java.io.*;
import java.util.*;
public class hotandcoldclusterdeterminer_test {
public static void main (String args [])throws IOException {
[Code]....
View Replies
View Related
Feb 27, 2015
The String class stores the characters of the string internally as a private char[] and calling someString.length() results in getting the length field from the character array. I am looking to get the details on how the length is implemented. I understand it is a field, but in the original question I provide sample code and really want to know if/how the resulting byte code may differ when compiled, perhaps I am just not seeing the simple answer through my confusion.
Link ....
View Replies
View Related
Jun 22, 2014
I have to validate a string whether it is a combination lowercase and uppercase and has the character '_'.
I m having trouble in framing the expression for these conditions in the matches function.
How it can be done..?? How to frame a the correct expression.
View Replies
View Related
Apr 26, 2014
I have this program to see the occurrences of a character in a string stored in a text file. My text file has the following contents (as shown below):
Quote
P-P-N-N-L-V
N-R-U-S-R-Q
K-Q-E-L-E-A
A-J-B-G-E-F
F-E-L-Q-R-R
U-F-J-V-I-M
P-I-Q-K-B-K
U-N-L-F-O-B
M-A-N-M-H-O
P-Q-J-D-N-I
G-U-O-D-F-I
Q-M-M-B-C-Q
N-B-I-L-E-J
S-A-T-Q-H-U
C-L-G-U-J-M
R-P-V-M-A-A
C-R-A-V-L-B
M-U-Q-K-M-Q
E-I-C-H-V-J
J-N-N-K-R-P
View Replies
View Related
Mar 7, 2014
Write a program using a while-loop (and a for-loop) that asks the user to enter a string, and then asks the user to enter a character. The program should count and display the number of times that the specified character appears in the string. (So, you will have two separate program codes, one using a while-loop and the other one using a for-loop.)
Example:
Enter a string: "Hello, JAVA is my favorite programming language."
Enter a character: e
The number of times the specified character appears in the string: 3
I don't even know where to begin I've only got this
import java.util.Scanner;
public class letterCounter {
public static void main(String [] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter a string");
String myString = sc.nextLine();
System.out.println("Enter a letter");
String letter = sc.nextLine();
}
}
View Replies
View Related
