For example, in the code, I have: System.out.println("Hello World");
The console will print: Hello World
So, I want to save the console output into a text file. Can anyone please hint me through this?
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JDL Wahaha
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Have you googled `writing to a file in java` ? – Simon McLoughlin Jan 31 '14 at 09:28
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3http://stackoverflow.com/questions/1994255/how-to-write-console-output-to-a-txt-file Possible duplicate. – hlkstuv_23900 Jan 31 '14 at 09:28
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You can either write directly to a file, or redirect the output of the program to a file using OS commands (see redirection in linux for example) – Hari Menon Jan 31 '14 at 09:28
2 Answers
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Create a file, and set as the out of the System class.
File file = new File("out.txt"); //Your file
FileOutputStream fos = new FileOutputStream(file);
PrintStream ps = new PrintStream(fos);
System.setOut(ps);
System.out.println("This goes to out.txt");
Abimaran Kugathasan
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2Won't this rewrite the entry each time you want to write into the file? – Jürgen K. Oct 10 '15 at 17:30
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Doesn't work ! did not find any console text inside file . after getting NPEx. – Dhiraj Thakur Jul 10 '17 at 05:45
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System class provide you a way to dump output in different stream which is System#setOut(PrintStream out)
Using this method you can pass you FileInputstream to System.setOut and you can save the console output.
PrintStream printStream = new PrintStream(new FileOutputStream(file));
System.setOut(printStream);
One interesting part of this question is though out is declared as final in System class but still you reassign this by System#setOut.
Subhrajyoti Majumder
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