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Core Java - Interview Questions and Answers for 'System.in' - 3 question(s) found - Order By Newest

 Q1. What is the difference between System.out ,System.err and System.in?
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Ans. System.out and System.err both represent the monitor by default and hence can be used to send data or results to the monitor. But System.out is used to display normal messages and results whereas System.err is used to display error messages and System.in represents InputStream object, which by default represents standard input device, i.e., keyboard.

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   Like         Discuss         Correct / Improve     java   io   system.out   system.err   system.in   difference between   advanced   basic interview question


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 Q2. Write code explaining use of Scanner class ?
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Ans. Scanner sc = new Scanner(System.in);
int i = sc.nextInt();

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   Like         Discuss         Correct / Improve     java   scanner   io   console io   scanner   System.in


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 Q3. What is System.in in Java ?Core Java2016-09-02 08:24:11

Ans. It is an InputSream which is usually connected to the keyboard input of console program.

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   Like         Discuss         Correct / Improve     System.in  Input Stream  Input Output


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