Sasanka Boxi

Recently we updated the JVM version, is this an issue with JVM

I have updated the code now...could you please verify once...

Hello Experts,

I am constantly getting the bellow error:
Could not rename zip file

Please help.

Here goes my code.

int BUFFER_SIZE = 256; // Create datebased timestamp for unique file names Format formatter; formatter = new SimpleDateFormat("yyyyMMdd_HHmmssS"); //Format as YearMonthDay_HourMinuteSecMillisec Date now = new Date(); String datestring = formatter.format(now); String oldZipfilename = zipfilename + datestring + ".old"; String newZipfilename = zipfilename + datestring + ".new"; File newZipfile = new File(newZipfilename); File zipfile = new File(zipfilename); ZipFile oldzip = null; File oldZipfile = null; ZipOutputStream zos = null; try { zos = new ZipOutputStream(new FileOutputStream(newZipfile)); if(zipfile.exists()) { // Copy old entries oldZipfile = new File(oldZipfilename); boolean success = zipfile.renameTo(oldZipfile); if (!success) { throw new ServiceException("Could not rename zip file from " + zipfile + " to " + oldZipfile); } oldzip = new ZipFile(oldZipfile); for (Enumeration entries = oldzip.entries(); entries.hasMoreElements();) { ZipEntry entry = (ZipEntry) entries.nextElement(); String entryFilename = entry.getName(); if (!entryFilename.equals(filename)) { BufferedInputStream is = new BufferedInputStream(oldzip.getInputStream(entry)); zos.putNextEntry(new ZipEntry(entry)); byte buffer[] = new byte[BUFFER_SIZE]; int count; while ((count = is.read(buffer, 0, BUFFER_SIZE)) != -1) { zos.write(buffer, 0, count); } zos.flush(); zos.closeEntry(); is.close(); } } } // Add new entry zos.putNextEntry(new ZipEntry(filename)); zos.write(ffdata); zos.closeEntry(); zos.close(); if (oldzip != null) { oldzip.close(); } if (oldZipfile != null) { oldZipfile.delete(); } // Remove ".new" boolean success = newZipfile.renameTo(zipfile); if (!success) { throw new ServiceException("Could not rename zip file from " + newZipfile + " to " + zipfile); } } catch (IOException e) { ServerAPI.logError(e); throw new ServiceException("appendToZipFile" + " error occured while appending to zip file: " + zipfilename + " ::: " + e.getMessage()); } finally { try { if (zos != null) { zos.close(); } if (oldzip != null) { oldzip.close(); } } catch (IOException e) { ServerAPI.logError(e); } }

Hello Rob,

We can Override the equals method to compare two similar object(not sure???)

But in my case its the comparision between the object and the String. Can you please place some hints how should I write the code to
override equals() and get the result.


Thanking You.
Sasanka

As you suggested I have tried to override the equals and hashcode method....No Idea how to override the equals method properly....

But Still its not working for me....I have pasted some sample code here

public class Risking
{
String empcode;
String name;
public String getEmpcode() {
return empcode;
}
public void setEmpcode(String empcode) {
this.empcode = empcode;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Risking(String empcode, String name)
{
this.empcode = empcode;
this.name = name;
}
public boolean equals(Object obj)
{
if(obj==null)
return false;
String s= (String)obj;
return s.equals(empcode);
}
public int hashCode()
{
final int PRIME = 31;
int result = 1;
result = PRIME * result + empcode.hashCode();
return result;
}




public static void main(String args[])
{
ArrayList aList = new ArrayList();
Risking r1 = new Risking("117","Rocky");
Risking r2 = new Risking("118","Vicky");
aList.add(r1);
aList.add(r2);
System.out.println(aList.contains("117"));
}

I have a Employee Class with two attributes:- empid and empname.

I have around 1000 Employee Class objects stored in an ArrayList. Now I need to search an Employee Objectin the arraylist based on the Employee ID.

Currently, I am iterating on the arrayList and checking each object's empid property.

Can I write method similar to the contains() of the ArrayList.

Can anyone provide some inputs on this.