型別 初始值
-------- --------
byte 0
short 0
int 0
long 0L
float 0.0F
double 0.0D
char \u0000
boolean flase
any class null
排版快捷鍵:shirt+alt+f
System.out.println();快捷鍵:sout[TAB]
new 配置新的記憶體空間
d2
|
d1
|
d0
|
y7
|
y6
|
y5
|
y4
|
y3
|
y2
|
y1
|
y0
|
0
|
0
|
0
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
0
|
0
|
0
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
0
|
1
|
0
|
1
|
0
|
1
|
1
|
1
|
1
|
1
|
0
|
1
|
1
|
0
|
1
|
1
|
1
|
1
|
1
|
1
|
0
|
1
|
1
|
1
|
1
|
0
|
0
|
1
|
1
|
1
|
0
|
1
|
1
|
1
|
1
|
1
|
0
|
1
|
1
|
1
|
0
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
0
|
1
|
0
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
0
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|