[Java]20·Ç³£ÓÐÓõÄJava³ÌÐòƬ¶Î
1. ×Ö·û´®ÓÐÕûÐ͵ÄÏ໥ת»»
1
2 String a = String.valueOf(2); //integer to numeric string
3 int i = Integer.parseInt(a); //numeric string to an int
2. ÏòÎļþĩβÌí¼ÓÄÚÈÝ
01
02 BufferedWriter out = null;
03 try {
04 out = new BufferedWriter(new FileWriter(”filename”, true));
05 out.write(”aString”);
06 } catch (IOException e) {
07 // error processing code
08 } finally {
09 if (out != null) {
10 out.close();
11 }
12 }
3. µÃµ½µ±Ç°·½·¨µÄÃû×Ö
1 String methodName = Thread.currentThread().getStackTrace()[1].getMethodName();
4. ת×Ö·û´®µ½ÈÕÆÚ
1
2 java.util.Date = java.text.DateFormat.getDateInstance().parse(date String);
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1
2 SimpleDateFormat format = new SimpleDateFormat( "dd.MM.yyyy" );
3 Date date = format.parse( myString );
5. ʹÓÃJDBCÁ´½ÓOracle
01 public class OracleJdbcTest
02 {
03 String driverClass = "oracle.jdbc.driver.OracleDriver";
04
05 Connection con;
06
07 public void init(FileInputStream fs) throws ClassNotFoundException, SQLException, FileNotFoundException, IOException
08 {
09 Properties props = new Properties();
10 props.load(fs);
11 String url = props.getProperty("db.url");&nbs
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static{
System.loadLibrary(DllConstants.DLL_PATH);
}
2¡£½«dllÖпª·¢µÄ½Ó¿ÚÉùÃ÷Ϊ±¾µØ½Ó¿Ú
public native String[] getTxt();
......
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ÔÚjava³ÌÐòÖÐ,ΪÁËʵÏÖͬ±¾µØÏµÍ³µÄÓ²¼þ¶Ë¿Ú(RS-232±ê×¼´®¿Ú/IEEE1284±ê×¼²¢¿Ú)ͨѶ,ĿǰÓÐÁ½¸ö·½·¨,µÚÒ»¸ö¾ÍÊÇÒÔǰ˵¹ýµÄ,ʹÓÃJNI¼¼Êõ×Ô¼ºÐ´Ò»¸öÓëjava³ÌÐòÏà¹ØµÄdll/soÎļþ,Õâ¸öÎļþ¿ÉÒÔÖ±½ÓºÍ±¾µØÏµÍ³Í¨ÐÅ,´Ó¶ø¹ÜÀí±¾µØ»úÆ÷µÄ¶Ë¿Ú,²»¹ýʹÓÃjava³ÌÐò¶À×ÔʵÏÖÒ»¸ö±È½ÏÍêÉÆµÄ¶Ë¿Ú¹ÜÀí½â¾ö·½°¸¶Ô¸öÈ˶øÑÔÊÇÒ»¸ö»¨·Ñ¾Þ´óÇÒ²»Ê ......
package com.hongsoft.test;
import java.io.*;
//¶¨ÖƵÄÀà×°ÈëÆ÷
public class TestCompile extends ClassLoader
{
String _compiler;
String _classpath;
public static void main(String[] args)
{
new TestCompile();
}
public TestCompile()
{
super(ClassLoader.getSystemClassLoader());
//ĬÈϱàÒëÆ ......