System.out.println to text file

Question

I was searching a way to get System.out.println texts and save them on a .txt file, for example:

    System.out.println("Java vendor: " + System.getProperty("java.vendor"));
    System.out.println("Operating System architecture: " + System.getProperty("os.arch"));
    System.out.println("Java version: " + System.getProperty("java.version"));
    System.out.println("Operating System: " + System.getProperty("os.name"));
    System.out.println("Operating System Version: " + System.getProperty("os.version"));
    System.out.println("Java Directory: " + System.getProperty("java.home"));

I want a .txt file to the output, any ideas? Thank you

Solution 1

You can do,

PrintStream fileStream = new PrintStream("filename.txt");
System.setOut(fileStream);

Then any println statement will go into the file.

Solution 2

First you need to declare a String text that contains your message you want to output:

String text = "Java vendor: " + System.getProperty("java.vendor");

Then you can use try-with-resources statement (since JDK 7) which will automatically close your PrintWriter, when all the output done:

try(PrintWriter out = new PrintWriter("texts.txt")  ){
    out.println(text);
}

Comments

[Tom]

Possible duplicate of Redirect System.out.println

[Admin]

I agree. Or he could use a platform-specific solution such as redirecting output to file in bash: java -jar program.jar > output 2> error-output

[Tom]

Prefer to close obvious duplicate questions, instead of farming reputation.