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String a = String.valueOf(2); //integer to numeric string | |
int i = Integer.parseInt(a); //numeric string to an int |
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BufferedWriter out = null; | |
try { | |
out = new BufferedWriter(new FileWriter(”filename”, true)); | |
out.write(”aString”); | |
} catch (IOException e) { | |
// error processing code | |
} finally { | |
if (out != null) { | |
out.close(); | |
} |
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String methodName = Thread.currentThread().getStackTrace()[1].getMethodName(); |
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java.util.Date = java.text.DateFormat.getDateInstance().parse(date String); | |
//or | |
SimpleDateFormat format = new SimpleDateFormat( "dd.MM.yyyy" ); | |
Date date = format.parse( myString ); |
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public class OracleJdbcTest | |
{ | |
String driverClass = "oracle.jdbc.driver.OracleDriver"; | |
Connection con; | |
public void init(FileInputStream fs) throws ClassNotFoundException, SQLException, FileNotFoundException, IOException | |
{ | |
Properties props = new Properties(); | |
props.load(fs); |
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java.util.Date utilDate = new java.util.Date(); | |
java.sql.Date sqlDate = new java.sql.Date(utilDate.getTime()); |
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public static void fileCopy( File in, File out ) | |
throws IOException | |
{ | |
FileChannel inChannel = new FileInputStream( in ).getChannel(); | |
FileChannel outChannel = new FileOutputStream( out ).getChannel(); | |
try | |
{ | |
// magic number for Windows, 64Mb - 32Kb) | |
int maxCount = (64 * 1024 * 1024) - (32 * 1024); | |
long size = inChannel.size(); |
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private void createThumbnail(String filename, int thumbWidth, int thumbHeight, int quality, String outFilename) | |
throws InterruptedException, FileNotFoundException, IOException | |
{ | |
// load image from filename | |
Image image = Toolkit.getDefaultToolkit().getImage(filename); | |
MediaTracker mediaTracker = new MediaTracker(new Container()); | |
mediaTracker.addImage(image, 0); | |
mediaTracker.waitForID(0); | |
// use this to test for errors at this point: System.out.println(mediaTracker.isErrorAny()); |
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//http://viralpatel.net/blogs/2009/02/creating-parsing-json-data-with-java-servlet-struts-jsp-json.html | |
//http://viralpatel.net/blogs/download/json/json-rpc-1.0.jar | |
import org.json.JSONObject; | |
... | |
... | |
JSONObject json = new JSONObject(); | |
json.put("city", "Mumbai"); | |
json.put("country", "India"); | |
... |
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//http://viralpatel.net/blogs/2009/04/generate-pdf-file-in-java-using-itext-jar.html | |
import java.io.File; | |
import java.io.FileOutputStream; | |
import java.io.OutputStream; | |
import java.util.Date; | |
import com.lowagie.text.Document; | |
import com.lowagie.text.Paragraph; | |
import com.lowagie.text.pdf.PdfWriter; |
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