What is the System setOut() function in Java?
The static System.setOut() method is used to reassign the standard output stream.
This method first uses the
checkPermission()method to check for the security manager and its permissions.
Syntax
static void setOut(PrintStream out)
Parameters
The setOut() method takes an argument of class PrintSteam type:
out: Standard output stream.
Return value
The setOut() method does not return a value.
setOut() returns SecurityException if the checkPermission() method does not allow reassigning or the security manager exits.
Example
In the code snippet below, we use the System.setOut() method to change the default console output stream object to file data.txt output stream.
The system.out.println() method outputs data into the file instead of the console.
EdPresso.java
data.txt
// Loading librariesimport java.lang.*;import java.io.*;// Main classpublic class EdPresso {public static void main(String[] args) throws Exception {// creating file for output streamFileOutputStream stream = new FileOutputStream("data.txt");System.out.println("Check data.txt for output in current directory");// set new stream objectSystem.setOut(new PrintStream(stream));System.out.println("Learn in-demand tech skills in half the time");}}
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