char and int array difference

Question

When I try to print the uninitialized static char array it gives run time error (Null pointer exception) whereas the uninitialized static int array

Answer 1

These are two different methods, and their APIs describe the behavior fully.

public void println(Object x) calls String.valueOf at first, which returns "null" if x is null.

See:

• http://docs.oracle.com/javase/8/docs/api/java/lang/String.html#valueOf-java.lang.Object-
• http://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html#println-java.lang.Object-

public void print(char[] c) calls the print(char[] c) method which throws NullPointerException if c is null.

See:

• http://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html#println-char:A-
• http://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html#print-char:A-