java中的数组

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1,数组的定义

String[] a = new String[5];//定义数组的长度，称为动态定义。

//下面两种是在分配空间的同时还初始化了值

String[] b = new String[]{"a","b","c","d","e"};

String[] c = {"a","b","c","d","e"};

2.数组的输出

String[] array = {"a","b","c","d","e"};

System.out.println(Arrays.toString(array));// [a, b, c, d, e]

3.转换数组为ArrayList

String[] array = {"a","b","c","d","e"};

ArrayList<String> arrayList = new ArrayList<String>(Arrays.asList(array));

System.out.println(arrayList);//[a, b, c, d, e]

4.检查数组中是否包含某些值

String[] array = {"a","b","c","d","e"};

System.out.println(Arrars,asList(array).contains("c"));//true


5.数组的排序

用到了Arrays.sort()方法，下面是几种用法

1）Arrays.sort(int[] array)//这样是对数组中所有元素按照从小到大的顺序排列

2）Arrays.sort(int[] a, int fromIndex, int toIndex)//这种是对数组从fromIndea到toIndex的位置按照从小到大的顺序排列（下标为toIndex的不参与排序）

3）Arrays.sort(T[] a,Comparator<T> c)//根据制定的比较器的顺序对a数组进行排序

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java中的数组

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原文地址：http://www.cnblogs.com/fengApr/p/4449017.html