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What is the difference between System.out, System.in and System.err streams in Java?
All the programming languages provide support for standard I/O where the user's program can take input from a keyboard and then produce an output on the computer screen. Similarly, Java provides the following three standard streams:
- Standard Input: This is used to feed the data to user's program and usually a keyboard is used as a standard input stream and represented as System.in.
- Standard Output: This is used to output the data produced by the user's program and usually a computer screen is used for standard output stream and represented as System.out.
- Standard Error: This is used to output the error data produced by the user's program and usually a computer screen is used for standard error stream and represented as System.err.
Updated on: 30-Jul-2019
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