Java Regular Expressions - Simple Search And Replace

Mar 1, 2014

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...

Java Code : access_log /home/%USER%/access_log mh_sh_highlight_all('java');

I want them changed so %USER% changes to a string, such as "cyrus," so they appear like this ...

Java Code: access_log /home/cyrus/access_log mh_sh_highlight_all('java');

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.

View Replies


ADVERTISEMENT

Checking SSN Without Regular Expressions

Jun 5, 2012

Prompt user to enter a social security number in the format DDD-DD-DDDD, where D is a digit. Displays "Valid SSN" for a correct ssn, and "Invalid SSN" otherwise.I have it working I am just looking for other ways to solve this with an array maybe or something simpler. I have used if statements here:

public static boolean checkSSN(String social) {
boolean valid = false;
// 9 digits and 2 hyphens. First three characters, 5 and 6, and 8, 9,
// 10, 11 are digits

[code]...

View Replies View Related

How To Use Regular Expressions For Integer Input

Jul 21, 2014

I have a program in which I take some characters input from User

using
String inputString=in.next();

How can i restrict user that input should be only char 0 or 1?

If the answer is regular expressions then What Should be Its Regular expressions?

View Replies View Related

Regular Expressions For Range Statements

Apr 1, 2014

I have the following Output

_G7120+1#=K,

_G7132+_G7133#=_G7120,

_G7144+_G7145#=_G7132,

_G7156+_G7157#=_G7144,

_G7168*Z#=_G7156,

_G7180*Z#=_G7168,

_G7192*Z#=_G7180,

_G7204*Y#=_G7192,

_G7192, in 10..15 / 16

X*Y#=_G7204,

X+Y#=_G7133,

_G7145+X#=Z1_a,

Y in 1..15,

Z/Y#=_G7157,

__X in 1..15 / 17 / 20.

From this, I need to extract the statements of variables that do not start with _G . I mean, I need to extract, Y in 1..15 , __X in 1..15 /17/20 but not _G7145 in 10..15 / 16.

I am using regular Expression for this as [^_G]^[A-Za-z0-9_]+ in|ins [-9 -9]..[-9-9] [/[-9-9]..[-9-9]]+

View Replies View Related

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..

View Replies View Related

Simple Form Of Doing Groups Of Expressions In One Line?

Jun 13, 2014

I am trying to put all this in one line - new DefaultTableModel(0, INT HERE) - there is a way?

List<ArrayList>valores=new ArrayList();
...
ArrayList valorPrimeiro=valores.get(0);
int primeiroTam =((ArrayList)valorPrimeiro.get(0)).size()+1;
defaultTable=new DefaultTableModel(0, primeiroTam);

View Replies View Related

Simple Regular Expression

Jan 17, 2014

I am currently enrolled in my first Java class. I have taken C# in the past so I've messed with some regular expressions, but I am having trouble finding a good website for Java. Is the syntax the same?I want to create a regular expression to only allow the following characters: c C f F [and any 1-3 digit number].

View Replies View Related

How To Implement Simple Binary Search Tree

May 17, 2015

I am trying to implement a simple binary search tree . How can I make a node in the tree which should store two pieces of information: a String variable called name, and a int variable called mark. ..

public class BinarySearchTree<E> implements Comparable<E> {
public BinaryTree<E> root;
int size;
int mark;
String name;
// Constructor
public BinarySearchTree()

[Code]...

View Replies View Related

Java Expressions With Multiple Operators

Jan 11, 2014

Following are the expressions? I tried running them and those are the answers I got. However, I cannot figure out the working.

//c = ++a + a++ - --a - a-- + a * + a/a ; //ans is 10
//c= a* + a/a ; ans. is 1.
//c= a * +3 ; //ans is 30
//c =5+ a* +2; //25
// c= 5+ a* + a/a ; //ans. is 15.

View Replies View Related

Save Logical Expressions In Java

Feb 3, 2015

How to save (condion1 & condition2) | condition3 |(Condition5 & condition6) etc in database and how to retrieve it.

View Replies View Related

Java - Replace Correct Number Into Letter

Mar 8, 2014

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?

View Replies View Related

Java String Regular Expression

Apr 17, 2014

I have written below regex for two lines.

String LN1Pattern = "^((?=.{1,35}$)(/([A-Z]{1,5})(|(//[a-zA-Z0-9]+))))$";
System.out.println("/ABC//FGhiJkl012345".matches(LN1Pattern));
 
String LN2Pattern = "^(|((s+(//[a-zA-Z0-9]{1,33})){1,2}))$";
System.out.println("".matches(LN2Pattern));

s+ is a newline character.

But when I combines both as below, its not giving me expected result.

^(((?=.{1,35}$)(/([A-Z]{1,5})(|(//[a-zA-Z0-9]+))))(|((s+(//[a-zA-Z0-9]{1,33})){1,2})))$

For string "/ABC//FGhiJkl012345

//abCD01EF02" - returns False. Expected is True

I think there is some problem in lookahead placed.

View Replies View Related

Regular Expression In Java Which Allow Only Numbers

Nov 28, 2013

I need a regular expression in java for phone number which that does not allow any character special character only numbers should be allowed.. My sample program is
 
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class c {
  public String removeOrReplacePhoneNumber(String input) {
  if (null == input)
  return input;

[Code] ....
 
but this is allowing characters like a,b,c..

View Replies View Related

Regular Expression In Java For HTML Pages

Feb 18, 2014

I need to parse an html web page to extract specific information from the tags in Java. For example,

<b>Species </b> Strain </td>

I need to look for the Strain info (Strain is variable in length) in the page. The whole web page is stored as a huge string. I need a regular expression that can identify all the Species and retrieve their corresponding strain info. how to do this or can propose some clever string manipulation methods in Java.

View Replies View Related

Validate IP Address With Java Regular Expression

Jan 23, 2015

I am trying to implement an example (Book* : Java SE 7 ..By S G Ganesh) for validating an IP address but it fails to validate a valid IP addresses. I found another example on the internet(**) and it works super fine, no problem at all. I edited the code (the one I got from internet) into the exact format like book and it still works super but i don't understand why the books' example doesn't work though both look exactly the same now ,further more, how can i compare String x and y for equality?

public class TestClass {
void validateIP(String ipStr) {
String one = "((25[0-5]|2[0-4]d|[01]?dd?)(.)){3}(25[0-5]|2[0-4]d|[01]?dd?)"; //copied from internet and edited
String two = "((25[0–5]|2[0–4]d|[01]?dd?)(.)){3}(25[0–5]|2[0–4]d|[01]?dd?)"; // copied from book
String x = "((25[0-5]|2[0-4]d|[01]?dd?)(.))";
String y ="((25[0–5]|2[0–4]d|[01]?dd?)(.))";

[Code] ....

View Replies View Related

Java Servlet :: String Regular Expression

Mar 7, 2014

Do not want to use loop and  Character.isLetter to validation string , not sure at how to using regular expression?

If I want  8 characters string length, the first 3 is letter, the remind character is number ...

^[a-z0-9_-]{8}$
^[a-zA-Z]{3} + [/d]{5} $  ??

View Replies View Related

Java Hangman Program - Replace Correct Letter With The Blanks

Apr 28, 2014

How to replace correct letter with the blanks in the program. Last method in program used to print correct letters.

import java.util.*;
import java.io.*;
public class Hangman {
public static Scanner keyboard;
public static final int MAXSIZE = 15000;
public static final int NUM_GUESS = 8;
public static final int WORD_LENGTH = 20;

[Code] ....

View Replies View Related

Servlets :: How To Get Attribute From Session In Regular Java Class

May 21, 2014

i have file index.jsp , that approach to reguar java class and call function . in that function i want to get attribute from session like this :

List<Coupon> couponsList = (List<Coupon>)request.getSession().getAttribute("listOfCouponsThatNotExpired");

because this regular java class i get error message ,how to solve this ?

View Replies View Related

Regular Expression To Find A Line Beginning With A Certain Character Using Java?

Jul 12, 2014

I have a text file that has the following lines:

the boy is smart
He is from Australia
** Highly important line
That's all

Now, I need a regular java expression that would match a line in this file that begins with the ** characters. That is, when I match the text with the regex, I should get only this line :

** Highly important line

How would I write this regex in java?

View Replies View Related

Ability To Search A Binary Search Tree And Return The Number Of Probes

Sep 1, 2014

I'm trying to build a method that can search a binary search tree for a specific target and then return the number of probes it took to get there. It seems to me that the best way to do this would be a recursive search method and a counter that tracks the number of calls. But I'm struggling with how to implement this. Here's the code I have so far. what works/doesn't work with the method.

// Method to search the tree for a specific name and
// return the number of probes
public T search(BTNode<T> btNode) {

[Code]....

View Replies View Related

Creating Search Method For Binary Search Tree

Apr 22, 2014

I want to create a search method that returns the frequency of a word in the search method.

public class IndexTree {
private class TreeNode {
TreeNode left;
String word;
int frequency;
TreeNode right;

[Code] .....

View Replies View Related

JSP / JSTL :: How To Group Expressions In EL

Nov 12, 2013

In jsp when using EL the parenthesis are not allowed for grouping of expressions. I mean

${(2+3)-1}

is not allowed so if i have to group expressions in EL how do i achieve it?
 
I wanted to do the following in EL

${(a==b && b==c) || (v==r && r==d)}

so how do i achieve this?

View Replies View Related

Swing/AWT/SWT :: Simple Java GUI

Feb 4, 2015

I'm just starting to learn Java GUI. I'm trying to make a simple GUI that will update dynamically but having trouble ending the loop correctly.The Currently I've got the GUI updating and stopping, but the Test class method loop does not terminate correctly, it continues to count.

import java.awt.*; // Using AWT container and component classes
import java.awt.event.*; // Using AWT event classes and listener interfaces
import java.util.Timer;
import java.util.TimerTask;

[code]....

View Replies View Related

Type Conversion In Expressions - Int To Byte

Feb 22, 2015

I am reading a book on Java and we are at a point where it is explaining type conversion in expressions. One of the examples shared has a byte being multiplied by itself and then assigned back to itself ...

byte b;
b = 10;
b = (byte) (b * b);

this is all good and dandy (that is, the code functions properly).

However, I am confused why I need to typecast here! Without the cast, the compiler screams, "Type mismatch: cannot convert from int to byte." Yet I haven't converted to an int?? It appears there was an implicit conversion.

The final value, 100, is clearly within byte's range of -127 to +127 isn't it? So I am lost as to what is the issue here.

View Replies View Related

Java GUI Search And Update

May 15, 2015

I'm trying to make a update page where you search for person info by their number then have the ability to change any info and save it back to the binary field. I have the search working but i don't know how to do the update,.here my code:

Java Code: import javax.swing.*;

import java.awt.*;
import java.awt.event.*;
import java.io.EOFException;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;

[code]....

View Replies View Related

How To Structure Simple Java Programs

May 8, 2015

how to structure simple programs (i.e. one-method algorithms for a simple purpose). There are a few different ways that I have been doing it, but I want to be consistent. Should I put both the one-method algorithm (e.g. a factorial function) and the main method that executes the algorithm into the same class and then export it to an executable .jar file for use? Or should I create one class for the algorithm and another for the main method that executes the algorithm? In addition, is there any reason that I should out these classes in a package before I export it?

As another similar question, if I have constructed two distinct classes with two separate purposes, and they are both used in the construction of a single program, then would it be best to just put the main method in a third, separate class or should I put it in one of the two classes?

View Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved