How can I Read/write a ascii file?

Question

How can I Read/write a ascii file? like this:
101     0.0000     -1.0000 +
102     -0.1887     -0.9485 +
103     -0.3578     -0.8639 +
104     -0.5022     -0.7516 +
105     -0.6177     -0.6177 +
106     -0.7018     -0.4689 +
107     -0.7533     -0.3120 +
108     -0.7723     -0.1536 +
109     -0.7603     -0.0000 +
110     -0.7198     0.1432 +
111     -0.6543     0.2710 +
112     -0.5682     0.3796 +
113     -0.4660     0.4660 +
114     -0.3531     0.5284 +
115     -0.2345     0.5660 +
116     -0.1152     0.5791 +
117     -0.0000     0.5689 +
118     0.1069     0.5375 +
119     0.2020     0.4876 +
120     0.2823     0.4224 +
121     0.3457     0.3457 +
122     0.3911     0.2614 +
123     0.4180     0.1732 +

Answer 1

import java.util.*;
import java.io.*;
class BallB{
     public static void main (String args [])
     throws Exception {
          String str=" ";
          String myString="";
          try {
            FileReader fr = new FileReader("test.txt");
            BufferedReader br = new BufferedReader(fr);
               FileWriter fw = new FileWriter("test1.txt");
               while(str!=null){
                    myString = str+"\n";
                    str = br.readLine();
                    fw.write(myString);
               br.close();
               fw.close();
          }catch (Exception e) {
               e.printStackTrace();
}