javaÖÐStringºÍintÖ®¼äµÄÏ໥ת»¯
javaÖÐ
StringºÍintÖ®¼äµÄÏ໥ת»¯
£¨1£©int i = Integer([String]); »ò
int i = Integer.parseInt([String],[int index]);
£¨2£©int i = Integer.valueOf([String]).intValue();
intÀàÐÍת»¯ÎªString
£¨1£©String s = String.valueOf([int]);
£¨2£©String s = Integer.toString([int]);
£¨3£©String s = "" + [int];
Ïà¹ØÎĵµ£º
1.¶ÁÈ¡XMLÎļþµÄÀࣺ
public class XMLUtils {
private final String DB_XML_FILE = "/XMLSetting.xml";
public Properties getPropertiesfromXML() {
URL url = XMLUtils.class.getResource(dBXMLFILE);
URI uri;
try {
uri = url.toURI();
InputSource xmlfile = new InputSource(uri.g ......
½ñÌìÔÚÊýÖµ¼ÆËãʱÅöµ½Ò»¸öÎÊÌâ.³ÌÐòÈçÏÂ:
double a = (3.3-2.4)/0.1;
System.out.println(a);
Äã¿ÉÄÜÈÏΪ½á¹ûºÜ¼òµ¥,²»¾ÍÊÇ9Âï,ÊÇÊÂʵÉÏ,½á¹ûΪ:8.999999998,ÎªÊ²Ã´ÄØ?ÎÒ·ÔÄÁËһЩ×ÊÁÏ,ÖÕÓÚÕÒ³öÁËÔÒò.
Ϊʲô¸¡µãÊý»á¶ªÊ§¾«¶È£¿
Ê®½øÖÆÊýµÄ¶þ½øÖƱíʾ¿ÉÄܲ»¹»¾«È·
¸¡µãÊý»òÊÇË«¾«¶È¸¡µ ......
import java.text.Format;
import java.text.SimpleDateFormat;
File file = new File("a.txt");
long time = file.lastModified();
Date d = new Date(time);
Format simpleFormat = new SimpleDateFormat("E dd MMM yyyy hh:mm:ss a");
String dateString = simpleFormat.format(d);
System.err.println(file.getN ......
ÖØÐ´µÄÖ÷ÒªÓŵãÊÇÄܹ»¶¨Òå×ÓÀàÌØÓеÄÌØÕ÷: Èç:
public class Father{
public void speak(){
System.out.println("Father");
}
}
public class Son extends Father{
public void speak(){
System.out.println("son");
}
}
ÕâÒ²½Ð×ö¶à̬ÐÔ,ÖØÐ´·½·¨Ö»ÄÜ´æÔÚÓÚ¾ßÓм̳йØÏµµÄÀàÖÐ,ÖØÐ´·½·¨Ö»ÄÜÖ ......