String

 1 import java.nio.charset.Charset;
 2 import java.io.UnsupportedEncodingException;
 3 
 4 public class StringContructorTest {
 5 
 6     public static void main(String[] args) {
 7         testStringConstructors() ;
 8     }
 9     private static void testStringConstructors() {
10         try {
11             System.out.println("------------------------ testStringConstructors -----------------------");
12 
13             String str01 = new String();
14             String str02 = new String("String02");
15             String str03 = new String(new char[]{‘s‘,‘t‘,‘r‘,‘0‘,‘3‘});
16             String str04 = new String(new char[]{‘s‘,‘t‘,‘r‘,‘0‘,‘4‘}, 1, 3); 
17             String str05 = new String(new StringBuffer("StringBuffer"));
18             String str06 = new String(new StringBuilder("StringBuilder"));
19             String str07 = new String(new byte[]{0x61, 0x62, 0x63, 0x64, 0x65});
20             // 0x61在ASC表中，对应字符"a"; 1表示起始位置，3表示长度
21             String str08 = new String(new byte[]{0x61, 0x62, 0x63, 0x64, 0x65}, 1, 3);
22              // 0x61在ASC表中，对应字符"a"; 1表示起始位置，3表示长度
23             String str09 = new String(new byte[]{(byte)0xe5, (byte)0xad, (byte)0x97, 
24                                                  (byte)0xe7, (byte)0xac, (byte)0xa6, 
25                                                  (byte)0xe7, (byte)0xbc, (byte)0x96, 
26                                                  (byte)0xe7, (byte)0xa0, (byte)0x81}, 
27                                       0, 12, "utf-8");  // 0表示起始位置，12表示长度。
28             String str10 = new String(new byte[]{(byte)0x5b, (byte)0x57,  
29                                                  (byte)0x7b, (byte)0x26, 
30                                                  (byte)0x7f, (byte)0x16, 
31                                                  (byte)0x78, (byte)0x01}, 
32                                       0, 8, "utf-16");  // 0表示起始位置，8表示长度。
33             String str11 = new String(new byte[]{(byte)0xd7, (byte)0xd6, 
34                                                  (byte)0xb7, (byte)0xfb,
35                                                  (byte)0xb1, (byte)0xe0, 
36                                                  (byte)0xc2, (byte)0xeb}, 
37                                       Charset.forName("gb2312")); 
38             String str12 = new String(new byte[]{(byte)0xd7, (byte)0xd6, 
39                                                  (byte)0xb7, (byte)0xfb,
40                                                  (byte)0xb1, (byte)0xe0, 
41                                                  (byte)0xc2, (byte)0xeb}, 
42                                       0, 8, Charset.forName("gbk")); 
43             String str13 = new String(new int[] {0x5b57, 0x7b26, 0x7f16, 0x7801},0,4);
44             //"字符编码"(\u5b57是‘字’的unicode编码)。0表示起始位置，4表示长度。
45             System.out.println("str01 = " + str01);
46             System.out.println("str02 = " + str02);
47             System.out.println("str03 = " + str03);
48             System.out.println("str04 = " + str04);
49             System.out.println("str05 = " + str05);
50             System.out.println("str06 = " + str06);
51             System.out.println("str07 = " + str07);
52             System.out.println("str08 = " + str08);
53             System.out.println("str09 = " + str09);
54             System.out.println("str10 = " + str10);
55             System.out.println("str11 = " + str11);
56             System.out.println("str12 = " + str12);
57             System.out.println("str13 = " + str13);
58         } catch (UnsupportedEncodingException e) {
59             e.printStackTrace();
60         }
61     }
62 }