Java 對象內存執行分析-Array（三）

Arrays in Java store one of two things: either primitive values (int, char, ...) or references (a.k.a pointers).

Arrays 在Java 中存儲兩者之一： 原始數據類型（int,char,...）或者是引用（a.k.a 指針） When an object is creating by using "new", memory is allocated on the heap and a reference is returned. This is also true for arrays, since arrays are objects.

當一個對象經過使用"new"來建立，會在堆內存中分配而且返回一個引用。這也一樣適用數組，由於數組是對象。

1. Single-dimension Array

int arr[] = new int[3];

The int[] arr is just the reference to the array of 3 integer. If you create an array with 10 integer, it is the same - an array is allocated and a reference is returned.

int數組arr 僅僅是三個Integer對象的數組的引用。若是你建立一個10個integer的數組，它是和一個數組相同分配在內存中，而且返回一個引用。

2. Two-dimensional Array

How about 2-dimensional array? Actually, we can only have one dimensional arrays in Java. 2D arrays are basically just one dimensional arrays of one dimensional arrays.

二維數組是如何實現的？廣泛的上，在java中，咱們只有一維數組。二維數組基本上僅公是一維數組中的一維數組。

int[ ][ ] arr = new int[3][ ];
arr[0] = new int[3];
arr[1] = new int[5];
arr[2] = new int[4];

Multi-dimensional arrays use the name rules.

多維數組也是相同的規則。