what s the default value of char

Question

char c     u0000     When I print c  it shows  a  in the command line window     So what s the default value of a char type field     Someone said   u0000  means null in unicode  is that right

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The default value of a char data type is   u0000   or 0  and a maximum value of   uffff   or 65 535 inclusive    You can see the info here

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The default char is the character with an int value of 0  zero    char NULLCHAR    char  0   char NULLCHAR     0

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u0000 is the default value for char type in Java  As others mentioned  you can use comparison to check the value of an uninitialized variable   char ch  if ch  0      System out println  Default value is the null character

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u0000  stands for null   So if you print an uninitialized char variable   you ll get nothing

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I think it is   u00000  or just    rather than   u0000   The 1st one has 5 zeros while the last one has four zeroes

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Note that there is a distinct difference between null and zero   In http   docs oracle com javase tutorial java nutsandbolts datatypes html  referenced above   the statement is made  -  There s also a special null literal that can be used as a value for any reference type  null may be assigned to any variable  except variables of primitive types  There s little you can do with a null value beyond testing for its presence  Therefore  null is often used in programs as a marker to indicate that some object is unavailable   That is why the following statements will give you an error and not the other  -  char a   null    Type mismatch  cannot convert from null to char   char b   0       Valid syntax

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u0000  is the default value for a character  Its decimal equivalent is 0   When you are declaring some char variable without initializing it    u0000  will be assigned to it by default   see this code  public class Test       char c       public static void main String args    throws Exception           Test t   new Test            char c1     u0000           System out println t c           System out println c1           System out println t c    c1             This code will print true for the last print

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Default value for char is  u0000  public class DefaultValues   char varChar  public static void main String   l         DefaultValues ob  new DefaultValues        System out println ob varChar    u0000             This will return true

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The default value of char is null which is   u0000  as per Unicode chart  Let us see how it works while printing out    public class Test Class           char c       void printAll              System out println  c       c                public static void main String   args            Test Class f   new Test Class            f printAll                 Note  The output is blank

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It s   u0000    See here for more information

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The default value of a char attribute is indeed   u0000   the null character  as stated in the Java Language Specification  section   4 12 5 Initial Values of Variables    In my system  the line System out println   u0000    prints a little square  meaning that it s not a printable character - as expected

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The default value of a char primitive type is   u0000  null character  as stated in the Java Language Specification   The shortcut for  u0000  is   0   So the null can be represented either by  u0000  or   0    The below Java program validates null representations using instance char field  c    public class DefaultValueForchar         char c      public static void main String   args            char c0     0           char cu0000     u0000           DefaultValueForchar obj   new DefaultValueForchar            System out println obj c           System out println c0           System out println cu0000           System out println c0  cu0000           System out println obj c  c0           System out println obj c  cu0000

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its tempting say as white space or integer 0 as per below proof  char c1     u0000   System out println     c1       System out println  int c1     but i wouldn t say so because  it might differ it different platforms or in future  What i really care is i ll never use this default value  so before using any char just check it is  u0000 or not  then use it to avoid misconceptions in programs  Its as simple as that

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Default value of Character is Character MIN VALUE which internally represented as MIN VALUE     u0000   Additionally  you can check if the character field contains default value as   Character DEFAULT CHAR   new Character Character MIN VALUE   if  DEFAULT CHAR compareTo  Character  value     0

[java] what's the default value of char?

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