Java example program to print message without using System.out.println()

Core java Interview Questions

Is it possible to print message without using system.out.println?

• Yes its possible to print message without using System.out.println("");

1. System.out.write("www.instanceofjava.com \n".getBytes());
2.  System.out.format("%s", "www.instanceofjava.com \n")
3.  PrintStream myout =  new PrintStream(new FileOutputStream(FileDescriptor.out));
      myout.print("www.instanceofjava.com \n");
4. System.err.print("This is custom error message");
5. System.console().writer().println("Hai");

1.System.out.write(Byte [] arg0);

• System.out.write(Byte [] arg0) method The java.io.FilterOutputStream.write(byte[] b) method writes b.length bytes to this output stream.

1. package com.instanceofjava;
2.  
3. public class PrintMessage {
4. 
   
5. public static void main(String[] args) throws IOException{
6.  
7.        System.out.write("Hello World".getBytes());
8. }
9. }

Output:

1. Hello World

2. PrintStream  java.io.PrintStream.format(String arg0, Object... arg1)

• System.out.format("format",Object obj) by using this method we can format the text and print

1. package com.instanceofjava;
2.  
3. public class PrintMessage {
4. 
   
5. public static void main(String[] args){
6.  
7.         System.out.format("%s", "James");
8. }
9.  
10. }

Output:

1. James

3. FileDescriptor:

• Create PrintStream object by passing FileOutputStream(FileDescriptor.out) object as an argument to the constructor

1. package com.instanceofjava;
2.  
3. public class PrintMessage {
4. 
   
5. public static void main(String[] args){
6.  
7.        PrintStream myout =  new PrintStream(new FileOutputStream(FileDescriptor.out));
             myout.print("i love Java");
8. }
9. }

Output:

1. i love java

4. System.err.print(""):

• We can use System.err.print("") method to print the message actually its used to print error message

1. package com.instanceofjava;
2.  
3. public static void main(String[] args){
4.  
5.        System.err.print("This is custom error message");
6. }
7. }

Output:

1. This is custom error message

5.System.console().writer().println("");

• System.console() returns null if your application is not run in a terminal System.console() provides methods for reading password without echoing characters

1. package com.instanceofjava;
2.  
3. public static void main(String[] args){
4.  
5.        System.err.print("This is custom error message");
6. }
7. }

Output:

1. This is custom error messageException in thread "main" java.lang.NullPointerException
       at PrintMessage.main(PrintMessage.java:24)

Bagikan

Jangan lewatkan

Java example program to print message without using System.out.println()

4/ 5

Oleh Kris Kimcil

Kris Kimcil 06.17 Komentar