如何判断一个中文字符串的长度

[zhyl1979]

下面这段代码输出的结果是：3
可是我希望的是他的unicode的长度。如何做？
谢谢！
public class temp
{
String str="你好啊";
public temp()
{
System.out.println(str.length());
}

public static void main(String args[])
{
temp obj=new temp();
}
}

[土不锅锅]

看看这个例子：
import java.io.*;
public class StringTest
{
public static void main(String[] args)
{
String aString = "这是一个测试串，This is a test string.";
String anotherString = null;
try {
anotherString = new String(aString.getBytes("GBK"), "ISO8859_1");
}
catch (UnsupportedEncodingException ex) {}
System.out.println(aString.length() + "," + anotherString.length());
}
}

[realfish]

楼主应该是要UTF-8的长度，是1-6变长编码，我上面的编码可行。
我觉得楼主在做插入数据库之前的长度判断。

[realfish]

package wuziqi;

import java.io.UnsupportedEncodingException;

public class temp
{
String str="你好啊";
public temp()
{

try {
byte[] a = str.getBytes("UTF-8");
System.out.println(a.length);
} catch (UnsupportedEncodingException e) {
}

}

public static void main(String args[])
{
temp obj=new temp();
}
}

[treeroot]

它的Unicode长度就是3呀每个Unicode占用2个字节,字节数是6

[haroyy]

Unicode中文长度是不会变的，英文字母从1字节变为2字节

[PoemCode]

来看一下文档：
length

public int length()

Returns the length of this string. The length is equal to the number of 16-bit Unicode characters in the string.

Specified by:
length in interface CharSequence

Returns:
the length of the sequence of characters represented by this object.

注意这么一句话：
The length is equal to the number of 16-bit Unicode characters in the string.
一个汉字只占一个 16-bit Unicode