How to read line by line in a file

Question

i have a text file which contents is as below:
=======================
[ID1]
Name=Me
Age=22
username=admin
Password=password
[ID2]
Name=You
Age=23
username=admin
Password=password
========================
i need to read this file line by line to store them in Map which the key of Map is "ID". anybody knows how to read it line by line? pls?

Answer 1

How about something like this: (not tested)
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
public final class ConfigReader {
  // map< String, Map > of sections
  private final Map _sectionMap = new HashMap();
    * Create a new config reader using the given configuration file.
  public ConfigReader( final String configFile ) throws IOException {
    // current section and line
    String section = null;
    String readLine = "";
    // read line by line
    final BufferedReader bufferedReader = new BufferedReader( new InputStreamReader( new FileInputStream( configFile ) ) );
    while ( ( readLine = bufferedReader.readLine() ) != null ) {
      // check the line
      if ( readLine.startsWith( "[" ) && readLine.endsWith( "]" ) ) {
        // get the section name
        section = readLine.substring( 1, readLine.length() - 2 );
      } else if ( readLine.indexOf( "=" ) != -1 ) {
        // get the id and value
        final String id = readLine.substring( 0, readLine.indexOf( "=" ) );
        final String value = readLine.substring( readLine.indexOf( "=" ) + 1 );
        getSectionMap( section ).put( id, value );
    * Get the section map for the given section name.
  private Map getSectionMap( final String section ) {
    // look for the map
    Map sectionMap = ( Map ) _sectionMap.get( section );
    if ( sectionMap == null ) {
       sectionMap = new HashMap();
       _sectionMap.put( section, sectionMap );
    return sectionMap;
    * Get the given property from the given section.
  public final String getProperty( final String section, final String propertyName ) {
    return ( String ) getSectionMap( section ).get( propertyName );