java.util.scanner

I'd like to specify a delimiter for a scanner that splits on some pattern, but doesn't remove that pattern from the tokens. I can't seem to make this work, as anything that is identified by the regex also gets eaten as part of the delimiter. Any suggestions? My specific problem, I have file that looks like: text/numbers mix numbers numbers text/numbers mix numbers numbers numbers . . I'd like to split out from the text/numbers mix+rows until the next text/numbers mix. I have the regex to identify them, but as stated, using that as the delimiter eats part of what I want. EDIT: code addition:

I am trying to use a scanner to edit the level of my tower defense game. However it will not update the level (the tile images) to that of the custom file (0 is grass 1 is stone -1 is nothing, etc.). I have found the error but how do i fix it, what do i need to add/change to get rid of this? java.lang.NullPointerException at Levels.loadLevels(Levels.java:11) at Window.define(Window.java:28) at Window.paintComponent(Window.java:44) line 11: for(int y=0;y<Window.room.block.length;y++) { line 28: levels.loadLevels(new File("levels/level1.level")); line 44: define(); This is the scanner file:

I have Java code that asks for user input and then stores this data in a string variable. The below function is part of a class called 'number' and is called in the main function. public static void setVal(int i){ Scanner readIn = new Scanner(System.in); //while (readIn.hasNextLine()){ str = readIn.nextLine(); numCheck = false; if (i == 1){ while (!numCheck){ if (str.contains(" ")){ System.out.println("Please input a single item."); str = readIn.nextLine(); } else if (!isNumeric(str)){ System.out.println("Please input a valid number."); str = readIn.nextLine(); } else { numCheck = true; value

I'm programming a game and in the program I need to add new enemies based off of a file. Right now my problem is that I've run into an infinite while loop when trying to read this file. I'm relatively new to programming so I'm not exactly sure how to fix this. Here is the problem code. An example of how the entry in the file looks is: "Troll,6,4,1". Thank you for your help. try { Scanner input = new Scanner(new File(filename)); while(input.hasNext()); { input.useDelimiter(",|\n"); String name = input.next(); int strength = input.nextInt(); int speed = input.nextInt(); int numVials = input

I want to open a file and scan it to print its tokens but I get the error: unreported exception java.io.FileNotFoundException; must be caught or declared to be thrown Scanner stdin = new Scanner (file1); The file is in the same folder with the proper name. import java.util.Scanner; import java.io.File; public class myzips { public static void main(String[] args) { File file1 = new File ("zips.txt"); Scanner stdin = new Scanner (file1); String str = stdin.next(); System.out.println(str); } } The constructor for Scanner you are using throws a FileNotFoundException which you must catch at compile

All I want to do is import data from a text file. The file exists at C:\temp\text.txt. However, I keep getting a file not found error. What the heck am I doing wrong??? public static void main(String[] args) throws IOException { String mFilename = "C:\\temp\\text.txt"; Scanner myDataStream = new Scanner(new File(mFilename));} For the sake of giving this question an answer: Googling brought up a case where someone had file extensions hidden and his file was actually text.txt.txt . Check if it's not your case. You can display extensions in Windows 7 by going in Organize > Folder and search

I am trying to scan through text files and add them to a map, the map and everything is working. However, the scanner seems to be stopping when it comes to a 'enter' in the text file, or a blank line. This is my problem here is my block of code for the scanner/mapper class OneButtonListener implements ActionListener { @Override public void actionPerformed(ActionEvent evt) { final JFileChooser oneFC = new JFileChooser(); oneFC.showOpenDialog(AnalysisFrame.this); String newLine = null; oneFC.getName(null); int returnVal = 0; File fileOne = oneFC.getSelectedFile(); Scanner input = null; try {