90005---Java输出数组的内容

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1. 输出内容最常见的方式

// List<String>类型的列表List<String> list = new ArrayList<String>();list.add("First");list.add("Second");list.add("Third");list.add("Fourth");System.out.println(list);

输出:
[First, Second, Third, Fourth]

// String数组String[] array = new String[] { "First", "Second", "Third", "Fourth" };System.out.println(array.toString());

输出:
[Ljava.lang.String;@12dacd1

2. 使用Arrays类输出数组内容

// String数组String[] array = new String[] { "First", "Second", "Third", "Fourth" };System.out.println(<span style="color:#ff0000;">Arrays.toString</span>(array));

输出:
[First, Second, Third, Fourth]

3. 输出数组的数组

可以使用Arrays.deepToString()方法。

String[] arr1 = new String[] { "Fifth", "Sixth" };String[] arr2 = new String[] { "Seventh", "Eight" };// 数组的数组String[][] arrayOfArray = new String[][] { arr1, arr2 };// 比较下面的输出<br>System.out.println(arrayOfArray);<br>System.out.println(Arrays.toString(arrayOfArray));<br>System.out.println(Arrays.deepToString(arrayOfArray));<br>

输出:
[[Ljava.lang.String;@1ad086a
[[Ljava.lang.String;@10385c1, [Ljava.lang.String;@42719c]
[[Fifth, Sixth], [Seventh, Eighth]]

import java.util.ArrayList;import java.util.Arrays;import java.util.List;public class PrintArray {public static void main(String[] args) {List<String> list = new ArrayList<String>();list.add("First");list.add("Second");list.add("Third");list.add("Fourth");System.out.println(list);String[] array = new String[] { "First", "Second", "Third", "Fourth" };System.out.println(array.toString());System.out.println(Arrays.toString(array));String[] arr1 = new String[] { "Fifth", "Sixth" };String[] arr2 = new String[] { "Seventh", "Eigth" };String[][] arrayOfArray = new String[][] { arr1, arr2 };System.out.println(arrayOfArray);System.out.println(Arrays.toString(arrayOfArray));System.out.println(Arrays.deepToString(arrayOfArray));}}

输出:

[First, Second, Third, Fourth]
[Ljava.lang.String;@12dacd1
[First, Second, Third, Fourth]
[[Ljava.lang.String;@1ad086a
[[Ljava.lang.String;@10385c1, [Ljava.lang.String;@42719c]
[[Fifth, Sixth], [Seventh, Eigth]]

原文 http://blog.csdn.net/chszs/article/details/8216142#

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