JavaÖеÄ×Ö·û±àÂëÓë½âÂë(ת)
ת http://jiangzhengjun.javaeye.com/blog/506952
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import junit.framework.TestCase;
/**
* ±àÂëÓë½âÂë²âÊÔ
* @author jzj
*/
public class TestEncodeDecode extends TestCase {
private char chineseChar = 'ÖÐ';
private char englishChar = 'a';
/**
* Java³ÌÐòÖеÄ×Ö·û¶¼ÊÇÕ¼Óöþ¸ö×Ö½Ú£¬ÒòΪ char ÀàÐͺñÈË«×Ö½ÚµÄÎÞ·ûºÅÕûÊý
*/
public void testCharToUnicode() {
//Ê®½øÖÆUncode±àÂë
System.out.println((int) chineseChar);//20013
System.out.println((int) englishChar);//97
//Ê®Áù½øÖÆUncode±àÂë
System.out
.println(Integer.toHexString((int) chineseChar).toUpperCase());//4E2D
System.out
.println(Integer.toHexString((int) englishChar).toUpperCase());//61
//¶þ½øÖÆUncode±àÂë
System.out.println(Integer.toBinaryString((int) chineseChar));//100111000101101
System.out.println(Integer.toBinaryString((int) englishChar));//1100001
}
/**
* ²»¹ÜÊÇÖÐÎÄ»¹ÊÇÓ¢ÎĶ¼»¹ÊÇÆäËû×Ö·û£¬Ã¿¸ö×Ö·û¶¼ÊÇÕ¼ÓÃÁ½¸ö×Ö½Ú£¬Ó¢ÎÄ×Ö·ûµÄ
* UTF-16±àÂëÓëUnicode±àÂëÊÇÒ»ÑùµÄ£¬Ö»²»¹ýUTF-16ÔÚ±àÂëʱ»áÔÚÂëÁ÷Ç°¼ÓÉÏ"FE FF"Á½¸ö×Ö½ÚµÄÄÚÈÝ£¬
* ±íʾ×Ö·ûÊÇÒÔUTF-16¸ñʽ´æ´¢µÄ£¬ÔÚ¶Áȡʱ³ÌÐò¾Í»áÖªµÀÊÇUTF-16±àÂëµÄ×Ö·û
*/
public void testCharToUTF16() {
try {
//--ÖÐÎÄ×Ö·ûתUTF-16
byte[] encodeArr = String.valueOf(chineseChar).getBytes("UTF-16");
//Ê®½øÖƱàÂëÊä³ö
for (int i = 0; i < encodeArr.length; i++) {
//-2 -1 78 45
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Static Factory Methods
Four Advantages:
1) have names
2) not required to create a new object each time they are invoked
3) return an object of any subtype of their return type
4) reduce the verbosity of creating parameterized type instances.(for example: newInstance() method) ......
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Java Appletº ......
package innerClass.test;
public class InheritTest
{
public static void main(String[] args)
{
Person p = new Person("LMS");
p.show();
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Annotations
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