title: need to delete a line of text from a file if it contains specific data in Java
body: <p>I need to be able to delete a line based on specific text in the line (not whole line). </p>
  
  <p>so far this is what i have, but it is deleting the whole file!! i am probably missing a semi colon or something silly.. can some one please help out?</p>
  
  <pre><code>import java.io.BufferedReader;
  import java.io.BufferedWriter;
  import java.io.File;
  import java.io.FileNotFoundException;
  import java.io.FileReader;
  import java.io.FileWriter;
  import java.io.IOException;
  import java.util.Scanner;
  
  
  public class DeleteStudent 
  {
  
      public static void removeStudentData()
      {
          File inputFile = new File("StudentsII.txt");
          File tempFile = new File("myTempFile.txt");
          BufferedReader reader = null;
          try {
              reader = new BufferedReader(new FileReader(inputFile));
          } catch (FileNotFoundException e2) {
              // TODO Auto-generated catch block
              e2.printStackTrace();
          }
          BufferedWriter writer = null;
          try {
              writer = new BufferedWriter(new FileWriter(tempFile));
          } catch (IOException e1) {
              // TODO Auto-generated catch block
              e1.printStackTrace();
          }
          CharSequence sID = null;
          String lineToRemove = (String) sID;
          String currentLine;
  
          Scanner UI = new Scanner(System.in);
          boolean found = false;
  
          System.out.println("\n***DELETE STUDENT RECORD***\n");
          System.out.println("Enter a student ID: ");
          sID=UI.next();
          try {
              while((currentLine = reader.readLine()) != null)
              {
                  String trimmedLine = currentLine.trim();
                  if(trimmedLine.contains(sID))
                      continue;
                  try {
                      writer.write(currentLine);
                  } catch (IOException e) {
                      // TODO Auto-generated catch block
                      e.printStackTrace();
                  }
              }
          } catch (IOException e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
          }
          boolean successful = tempFile.renameTo(inputFile);
          Menu.displayMenu();
      }
  }
  </code></pre>
  
  <p>txt file contains following info...</p>
  
  <pre><code>Martha Stewart 123 Freshman
  Cindi Lauper 234 Senior
  Tina Turner 345 Freshman
  </code></pre>