Java array definition and initialization +print printing problems

General Write SyStem.out.pirntln (xxxxx); This is the default line break equals after printing by default added:/n/r, if you want to output on the same line, then write: system.out.print (xxx);

Defined:
int a[]; Declaration not initialized
A = new int [10]; Define the size of the footprint (10 Int)
int a[] = new int [10]; Declare and define size (that is, space assigned the specified Size)
int a[] = {n/a}; Declares and initializes, with a space size of 3 int.
Initialization

One-dimensional arrays

1)  
int[] a;   declaration, not initialized

2)  
int[] a=new int[5];   

3)  
int[] a={1,2,3,4,5};  
Initialize to the given value
4)  
int[] a=new int[]{1,2,3,4,5};   

int[] a=new int[5]{1,2,3,4,5};  
error, cannot define a dimension expression if an array initialization operation is provided
5)  
int[] a;  
A=new int[5];    right, Same as (2)

int[] a;  

a={1,2,3,4,5};   Error array constants can only be used in initialization operations, such as (3)

6)   
a[0]=1;  
Error because the array is not initialized and cannot be assigned a value of a[1]=2;  Two-dimensional arrays
  
1)  

declaration, not initialized

2)   int[][] a=new int[2][3];   


3)  
int[][] a={{1,2},{2,3},{3,4}};  
Initialize to the given value
int[][] a={{1,2},{2,3},{3,4,5}};  
No mistake, The array space is not contiguous, so the size of each dimension is not required
4)  



The size of each dimension can be different


5)  
int[][] a=new
int[][]{{1,2},{2,3},{3,4,5}};  
Same (3)

Java array Definition and initialization of +print printing problems