How to write content on a text file using java?

Question

i am having a program in java.which system.out some strings,i need to save each of them in a text file
it is showing in a format
ruo1 row2 row3
i want it in
row1
row2
row3
how can i do that in java?

import java.util.Arrays;
import java.io.*;
public class BruteForce {
 public static FileOutputStream Output;
    public static PrintStream file;
    public static String line;

public static void main(String[] args) {
String password = "javabeanc";
char[] charset = "abcdefghijklmnopqrstuvwxyz".toCharArray();
BruteForce bf = new BruteForce(charset, 8);

String attempt = bf.toString();
while (true) {
    FileWriter writer;
    try {
      writer = new FileWriter("test.txt");

        writer.write(attempt+"\n");

      writer.close();
    } catch (IOException e) {
      e.printStackTrace();
    }


attempt = bf.toString();
System.out.println("Tried: " + attempt);

bf.increment();
}
}


private char[] cs; // Character Set
private char[] cg; // Current Guess

public BruteForce(char[] characterSet, int guessLength) {
cs = characterSet;
cg = new char[guessLength];
Arrays.fill(cg, cs[0]);
}

public void increment() {
int index = cg.length - 1;
while(index >= 0) {
if (cg[index] == cs[cs.length-1]) {
if (index == 0) {
cg = new char[cg.length+1];
Arrays.fill(cg, cs[0]);
break;
} else {
cg[index] = cs[0];
index--;
}
} else {
cg[index] = cs[Arrays.binarySearch(cs, cg[index]) + 1];
break;
}
}
}

public String toString() {
return String.valueOf(cg);
}
}

CoolBeans · Accepted Answer · 2010-12-06 02:01:28Z

6

Very quick code. I apologize if there are compile errors.

 import java.io.FileWriter;
  import java.io.IOException;  
  public class TestClass {
      public static String newLine = System.getProperty("line.separator");
      public static void main(String[] a) {
        FileWriter writer;
        try {
          writer = new FileWriter("test.txt");
          for(int i=0;i<3;i++){
            writer.write(row+i+newLine);
          }
          writer.close();
        } catch (IOException e) {
          e.printStackTrace();
        }

      }
    }

edited Dec 6, 2010 at 2:01

answered Dec 6, 2010 at 1:41

CoolBeans

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Comments

matcheek · Accepted Answer · 2010-12-06 01:24:35Z

0

how about adding a new line character "\n" to each row ?

answered Dec 6, 2010 at 1:24

matcheek

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4 Comments

Alex Mathew Over a year ago

i need to save that to a file,above format is this is showing in my system.out.println,but i need to format it like Row1 Row2 Row3 in my file

MrGomez Over a year ago

Do you have source-level access to this particular program, or are you asking for general post-processing help? If the former, including a line feed character \n is appropriate for a Unix-based system. For Windows, use carriage-return line-feed as \r\n. If this is general post-processing help, you may not need a Java solution at all.

Falmarri Over a year ago

What code do you have that isn't producing the output that you want?

Stephen C Over a year ago

In your question you wrote about code that you have already written: "i am having a program in java.which system.out some strings". Then, in your first comment you wrote about the same code "above format is this is showing in my system.out.println". Show us THAT code.

Asha · Accepted Answer · 2010-12-06 06:11:48Z

0

u can use PrintWriter pw;
pw.println(row+i) in above instead of hard coding newLine

answered Dec 6, 2010 at 6:11

Asha

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Comments

sanjeev · Accepted Answer · 2022-05-18 18:23:04Z

0

Using JDK 11 one can write:

public void writeToFile() {
    String content = "Line 1\nLine 2";
    Path path = Paths.get("./resources/sample-new.txt");
    Files.writeString(path, content);
}

answered May 18, 2022 at 18:23

sanjeev

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