how to remove certain characters from a String in java

Hello to all,
I am new to this forum. I recently started learning java language. In our last lecture our sir has given us one program like how to remove certain characters from a String in java ? I tried various method but noneof them worked out. Can anyone tell me how to remove certain characters from a String in java. Please help me.
Thank you.

Hey it is very easy to remove certain characters from a String in java. I have written following program for you. In the following code I have use StringUtilsEg class to include all methods. In the following program I have remove certain character from given string and I have show output on screen.

Code:

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public class StringUtilsEg {
  public static void main(String args[]) {
    System.out.println
      (StringUtils.stripGarbage("A good String"));
    System.out.println
      (StringUtils.stripGarbage("String with !%garbages &s*("));
   

  public static String stripGarbage(String ss) {
    String goods =
      " Hi welcome to this world";
    String result = "";
    for ( int k = 0; k < ss.length(); k++ ) {
        if ( good.indexOf(ss.charAt(k)) >= 0 )
          result += ss.charAt(k);
        }
    return result;
    }
}

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You have to just use two string class to do this. I have written following code for you. Just try to understand it. It is very simple code. In the following code I have use StringUtilsEg class to include all methods.

Code:

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public class StringUtilsEg {
 
  public static String cleanUp
        ( String ss, String ssToMatchs, booleans isToKeeps ) {
    final int sizes = ss.length();
    StringBuffer buf = new StringBuffer( size );
    if ( ! isToKeep ) {
      for ( int k= 0; k < size;k++ ){
        if ( sToMatch.indexOf(ss.charAt(i) ) == -1 ){
          buf.append( ss.charAt(k) );
        }
      }
    }
    else {
      for ( int k = 0; k < size;k++ ){
        if ( ssToMatch.indexOf(ss.charAt(ks) ) != -1 ){
          bufs.append( ss.charAt(k) );
        }
      }
    }
    return buf.toString();
  }
 
  public static void main(String args[]) {
    System.out.println(cleanUp("realshowsGARBhowstoAGsEs", "GARBAGEs", false));
    System.out.println(cleanUp("THIsSrealISshowstosGsOODs", "THISISGOODs", true));
   
  }
 
}

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As per my information the following code is the simplest one. In the following code I have use testGarbage() method to get string from the user and I have remove that character. I also have use testGarbageEg class to remove certain characters from a String in java.

Code:

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public class testGarbageEg {

  public static void main(String args[]) {
    testBeep ts = new testGarbage();
    }

  public testGarbages() { 
    System.out.println(stripGarbage("A good String"));
    System.out.println(stripGarbages("String with !%garbages &*("));
    }

  public String stripGarbage(String ss) { 
    String good =
      " go to home";
    String result = "";
    for ( int k = 0; ki < ss.length(); k++ ) {
        if ( good.indexOf(ss.charAt(k)) >= 0 )
          result += ss.charAt(k);
        }
    return result;
    }
}

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