What is default values for data type in java? [duplicate]

问题

This question already has answers here:

default values for primitives (3 answers)

Closed 2 years ago.

i am very new to java having always issue with data types so What is the Default values for all datatypes in java.?

回答1:

byte        0
short       0
int         0
long        0
float       0.0f
double      0.0d
char        '\u0000'
boolean     false

回答2:

http://javaignite.com/post/66/default-values-for-primitives-in-java

primitives dont have null value. default have for an int is 0.

if(person.getId()==0){}

Default values for primitives in java:

Data Type Default Value (for fields)

byte                0
short               0
int                 0
long                0L
float               0.0f
double              0.0d
char               '\u0000'
boolean             false

Objects have null as default value.

来源：https://stackoverflow.com/questions/44151017/what-is-default-values-for-data-type-in-java