Aditya Sirohi

Hi All,

I am writing a dummy class to see how ObjectInputStream works. I was able to successfully serialize an Object, but have issue reading it.

Here is my Address Object class:

import java.io.Serializable; public class Address implements Serializable { /** * */ private static final long serialVersionUID = 1L; String street; String country; public Address(String street, String country) { super(); this.street = street; this.country = country; } public void setStreet(String street){ this.street = street; } public void setCountry(String country){ this.country = country; } public String getStreet(){ return this.street; } public String getCountry(){ return this.country; } }


Class used to serialize object:


import java.io.FileOutputStream; import java.io.ObjectOutputStream; import java.util.ArrayList; public class Serializer { public static void main (String args[]) { Serializer serializer = new Serializer(); ArrayList<Address> adds = new ArrayList<Address>(); Address add1 = new Address("wall street", "US"); Address add2 = new Address("city", "US"); adds.add(add1); adds.add(add2); serializer.serializeAddress(adds); } public void serializeAddress(ArrayList<Address> ads){ try{ FileOutputStream fout = new FileOutputStream("c:\\address.ser"); ObjectOutputStream oos = new ObjectOutputStream(fout); for(Address ad : ads){ oos.writeObject(ad); } oos.close(); fout.close(); System.out.println("Done"); System.out.println(ads.size()); }catch(Exception ex){ ex.printStackTrace(); } } }


Class used to read serialized object from a file:

import java.io.FileInputStream; import java.io.ObjectInputStream; import java.io.Serializable; import java.util.ArrayList; public class Deserializer { private static final long serialVersionUID = 1L; public static void main (String args[]) { Deserializer deserializer = new Deserializer(); deserializer.deserialzeAddress(); } public void deserialzeAddress(){ ArrayList<Address> address = new ArrayList<Address>(); try{ FileInputStream fin = new FileInputStream("c:\\address.ser"); ObjectInputStream ois = new ObjectInputStream(fin); address = (ArrayList<Address>) ois.readObject(); String a = ((Address)address.get(0)).getCountry(); System.out.println(a); ois.close(); fin.close(); }catch(Exception ex){ ex.printStackTrace(); } } }


When i run my Deserializer class i am seeing this error:

java.lang.ClassCastException: com.tivoli.dsm.reporting.itm.tsm.agent.Address incompatible with java.util.ArrayList at com.tivoli.dsm.reporting.itm.tsm.agent.Deserializer.deserialzeAddress(Deserializer.java:23) at com.tivoli.dsm.reporting.itm.tsm.agent.Deserializer.main(Deserializer.java:16)


Issue is with this line in the Deserializer class: address = (ArrayList<Address>) ois.readObject();


What can be the issue here?

Thanks
Adi

Hi All,

I am writing a dummy class to see how ObjectInputStream works. I was able to successfully serialize an Object, but have issue reading it.

Here is my Address Object class:

import java.io.Serializable; public class Address implements Serializable { /** * */ private static final long serialVersionUID = 1L; String street; String country; public Address(String street, String country) { super(); this.street = street; this.country = country; } public void setStreet(String street){ this.street = street; } public void setCountry(String country){ this.country = country; } public String getStreet(){ return this.street; } public String getCountry(){ return this.country; } }


Class used to serialize object:


import java.io.FileOutputStream; import java.io.ObjectOutputStream; import java.util.ArrayList; public class Serializer { public static void main (String args[]) { Serializer serializer = new Serializer(); ArrayList<Address> adds = new ArrayList<Address>(); Address add1 = new Address("wall street", "US"); Address add2 = new Address("city", "US"); adds.add(add1); adds.add(add2); serializer.serializeAddress(adds); } public void serializeAddress(ArrayList<Address> ads){ try{ FileOutputStream fout = new FileOutputStream("c:\\address.ser"); ObjectOutputStream oos = new ObjectOutputStream(fout); for(Address ad : ads){ oos.writeObject(ad); } oos.close(); fout.close(); System.out.println("Done"); System.out.println(ads.size()); }catch(Exception ex){ ex.printStackTrace(); } } }


Class used to read serialized object from a file:

import java.io.FileInputStream; import java.io.ObjectInputStream; import java.io.Serializable; import java.util.ArrayList; public class Deserializer { private static final long serialVersionUID = 1L; public static void main (String args[]) { Deserializer deserializer = new Deserializer(); deserializer.deserialzeAddress(); } public void deserialzeAddress(){ ArrayList<Address> address = new ArrayList<Address>(); try{ FileInputStream fin = new FileInputStream("c:\\address.ser"); ObjectInputStream ois = new ObjectInputStream(fin); address = (ArrayList<Address>) ois.readObject(); String a = ((Address)address.get(0)).getCountry(); System.out.println(a); ois.close(); fin.close(); }catch(Exception ex){ ex.printStackTrace(); } } }


When i run my Deserializer class i am seeing this error:

java.lang.ClassCastException: com.tivoli.dsm.reporting.itm.tsm.agent.Address incompatible with java.util.ArrayList at com.tivoli.dsm.reporting.itm.tsm.agent.Deserializer.deserialzeAddress(Deserializer.java:25) at com.tivoli.dsm.reporting.itm.tsm.agent.Deserializer.main(Deserializer.java:15)


Issue is with this line in the Deserializer class: address = (ArrayList<Address>) ois.readObject();


What can be the issue here?

Thanks
Adi

Thanks for making me think!!

public class Test { public static void main(String[] args) { String str = "abc123AA"; if(str.matches("(.*)[a-z](.*)") && str.matches("(.*)[A-Z](.*)") && str.matches("(.*)[0-9](.*)")){ System.out.println("true"); } } }

I am missing something in the REGEX, what the current REGEX do is to look for occurrence of [A-Za-z0-9] in the input String? I am not sure.. sorry!!!

This is a dirty code, but it solves the purpose. Any idea to optimize it?

public class Test { public static void main(String[] args) { String str = "AAA12aaBCRE"; String[] substrings = str.split("[^A-Z]+"); String[] lowercaseString = str.split("[^a-z]+"); String[] digit = str.split("[^0-9]+"); int substringscount = 0; int lowercaseStringcount = 0; int digitcount = 0; for (String s : substrings) { if (!s.isEmpty()) { substringscount = substringscount + s.length(); } } for (String s : lowercaseString) { if (!s.isEmpty()) { lowercaseStringcount = lowercaseStringcount + s.length(); } } for (String s : digit) { if (!s.isEmpty()) { digitcount = digitcount + s.length(); } } System.out.println(substringscount); System.out.println(lowercaseStringcount); System.out.println(digitcount); } }

I did this, but it does not gives print true. Am i missing something?

public class Test { public static void main(String[] args) { String str = "abc123AA"; if(str.matches("^[a-z]$") && str.matches("^[A-Z]$") && str.matches("^[0-9]$")){ System.out.println("true"); } } }

Hi All,

How to find the occurrence of one from each alphanumeric categories in a String?
Upper Case: [A-Z]
Lower Case: [a-z]
Digits: [0-9]

Example:
Aa1Bb2 = returns true
aa1bb = returns false as there is no upper case character
aaBab = returns false as there is no digits.

I am using following regex pattern --> "^[a-zA-Z0-9]+$"
But it not seem seem to return false when any one of the character is missing from the above catogories.

Thanks
Adi

I wanted to share this now:

public class Test { public static void main(String[] args) { String test = "test-??123"; Pattern p = Pattern.compile(".*\\W+.*"); Matcher m = null; int counter = 0; for(int i =0;i<test.length();i++){ m = p.matcher(Character.toString(test.charAt(i))); if(m.find()){ counter ++; } } System.out.println(counter); } }

Thanks Steve. I got it.

Hi All,

Is there a way to use Java Regex to count number of non alphanumeric characters in the String.

For example:
a1b2c3$3# should return 2

I have something like this:
Pattern p = Pattern.compile(".*\\W+.*");
Matcher m = p.matcher(test);

But this returns if String contains non alphanumeric characters and not the count.

Any help or suggestion is appreciated.
Thanks,
Aditya

Thanks, aah my eyes.. This is what happens when you work 2nights straight back on back

This change worked:- String replacedVal = remoteDirMSI.replaceAll("/", "\\\\\\\\");

Regards
Adi

public class Test { public static void main(String[] args){ String installationCommand = "msiexec.exe /i |DEPLOYDIR|\\32MSI.msi"; String remoteDirMSI = "C:/Test/msi"; String replacedVal = remoteDirMSI.replace('/', '\\'); String middle = installationCommand.replaceAll("[|]", ""); String installationFinal = middle.replaceAll("DEPLOYDIR", replacedVal); System.out.println("Replaced directory is:" +replacedVal); System.out.println( "middle value is:" +middle); System.out.println( "installationFinal value is:" +installationFinal); } }

Jeff Verdegan: does that make it better?

String installationCommand = "msiexec.exe /i |DEPLOYDIR|\32MSI.msi"; String remoteDirMSI = "C:/Test/msi" String replacedVal = remoteDirMSI.replace('/', '\\'); String middle = installationCommand.replaceAll("[|]", ""); String installationFinal = middle.replaceAll("DEPLOYDIR", replacedVal); System.out.println("Replaced directory is:" +replacedVal); System.out.println( "middle value is:" +middle); System.out.println( "installationFinal value is:" +installationFinal);
The output is: Replaced directory is:C:\Test\msi middle value is: msiexec.exe /i DEPLOYDIR\32MSI.msi installationFinal value is: msiexec.exe /i C:Testmsi\32MSI.msi

Where as the output i was expecting was:
installationFinal value is: msiexec.exe /i C:\Test\msi\32MSI.msi

What am i doing wrong here??

-Adi

Hello,


I want to replace "|DEPLOYDIR|" expression in the string test.

String test = "cmd /c start /wait |DEPLOYDIR|\\setup";
test = test.replaceAll("|^DEPLOYDIR|$", "testvalue"); --> does not seem to work!!

I want an output like:
cmd /c start /wait testvalue\\setup

How can i do this??

-Adi