java.util.Formatter æ¯JDK1.5æ°å¢çç±»åºï¼åè½å¾å¼ºå¤§ï¼ä¸»è¦ç¨æ¥æ ¼å¼åææ¬çã
æ ¼å¼å主è¦ç¨å¨ææ¬è¾åºæ¹é¢ï¼æ¯å¦ï¼æ°åãæ¥æãéé¢çï¼è¿æ类似è¶
å¸çè´ç©åå°ç¥¨ççï¼é½ä¼ç¨å°æ ¼å¼åè¾åºçå·¥å
·ãå¨æ¤ç±»æ²¡åºç°ä¹åï¼åªè½éè¿ç©ºæ ¼ç¼©è¿æè¿ä¸ªå¶è¡¨ç¬¦æ¥å¯¹åæ®çæ ¼å¼åä¸äºæ§å¶ï¼ç°å¨åªè¦ææ¡java.util.Formatterï¼å°±å¯ä»¥çç»åºç¨äº ã
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import java.util.Calendar;
import java.util.Formatter;
import java.util.GregorianCalendar;
/**
* Formatteræµè¯
*
* @author leizhimin 2009-7-16 16:31:02
*/
public class TestFormatter {
public static void main(String[] args) {
//%[argument_index$][flags][width][.precision]conversion
Formatter f1 = new Formatter(System.out);
//æ ¼å¼åè¾åºå符串åæ°å
f1.format("æ ¼å¼åè¾åºï¼%s %d", "a", 1235);
System.out.println("\n--------");
//æ¥æçæ ¼å¼å
Calendar c = new GregorianCalendar();
f1.format("å½åæ¥æ:%1$tY-%1$tm-%1$te", c);
System.out.println("\n--------");
//æ¥æçæ ¼å¼åï¼å¹¶å°æ ¼å¼åç»æåå¨å°ä¸ä¸ªå符串åéä¸
String s = String.format("å½åæ¥æ:%1$tY-%1$tm-%1$te", c);
System.out.println(s);
//2$ï¼å第äºä¸ªåæ°
//-: æå®ä¸ºå·¦å¯¹é½ï¼é»è®¤å³å¯¹é½
//5ï¼æ大è¾åºå®½åº¦ä¸º20,ä¸å¤ä¼è¡¥ç©ºæ ¼ï¼å®é
è¥è¶
è¿åå
¨é¨è¾åº
//.2ï¼å¨æ¤è¡¨ç¤ºè¾åºåæ°2çæ大å符æ°éï¼å¦ææ¯æµ®ç¹æ°åï¼å表示å°æ°é¨åæ¾ç¤ºçä½æ°
//s ï¼è¡¨ç¤ºè¾å
¥åæ°æ¯å符串
f1.format("%2$-5.2s %1$2s", "123", "456");
//å°æ ¼å¼åçç»æåå¨å°å符串
System.out.println("\n--------");
String fs = String.format("身é«ä½é(%.2f , %d)", 173.2, 65);
System.out.println(fs);
//printf()æ¬è´¨ä¸ä¹æ¯ç¨System.outä½ä¸ºè¾åºç®æ æé Formatter对象
//è°ç¨formatæ¹æ³ï¼å¹¶å°printfçåæ°ä¼ ç»formatæ¹æ³èå¾ã
System.out.println("\n--------");
System.out.printf("身é«ä½é(%.2f , %d)", 180.2, 65);
}
}
è¿è¡ç»æï¼
æ ¼å¼åè¾åºï¼a 1235
--------
å½åæ¥æ:2009-07-16
--------
å½åæ¥æ:2009-07-16
45 123
--------
身é«ä½é(173.20 , 65)
--------
身é«ä½é(180.20 , 65)
Process finished with exit code 0
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