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How to read input from java console in java?


Below example shows how to read input from java console. You have to pass object to InputStreamReader class. Create BufferedReader object by passing InputStreamReader, readLine() method can helps you to get the typed commands.

package com.java2novice.files;


public class ReadFromConsole {

	public static void main(String a[]){
		BufferedReader br = null;
		Reader r = new InputStreamReader(;
		br = new BufferedReader(r);
		String str = null;
		try {
				System.out.println("Enter Input, exit to quit.");
				str = br.readLine();
			} while (!str.equalsIgnoreCase("exit"));
		} catch (IOException e) {
		} finally{
				if(br != null) br.close();
			}catch(Exception ex){}

Enter Input, exit to quit.
Enter Input, exit to quit.
I am entering data through console
I am entering data through console
Enter Input, exit to quit.
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Knowledge Centre
Pass by value Vs Pass by reference
Pass by value: Passing a copy of the value, not the original reference.

Pass by reference: Passsing the address of the object, so that you can access the original object.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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