How to kill a thread in JAVA ??

Ans:

'Killing a thread' is not the right phrase to use. Here is one way we can implement graceful exit of the thread:

class TaskThread implements Runnable {

    boolean shouldStop;

    public TaskThread(boolean shouldStop) {
        this.shouldStop = shouldStop;
    }

    @Override
    public void run() {

        System.out.println("Thread has started");

        while (!shouldStop) {
            // do something
        }

        System.out.println("Thread has ended");

    }
public void stop() {
        shouldStop = true;
    }


}
public class ThreadStop
{
public static void main(String[] args)
{
System.out.println("Start");

// Start the thread
TaskThread task = new TaskThread(false);
Thread t = new Thread(task);
t.start();

  // Stop the thread
task.stop();

  System.out.println("End");

}
}

JAVA StringBuffer and StringBuilder object conversion to String

We can convert a StringBuffer or StringBuilder object  to String by using toString() method of Object class.

StringConversion.java

class StringConversion

{

          public static void main(String[] args)

          {

                   StringBuffer sb1=new StringBuffer("Silan");

                   StringBuilder sb2=new StringBuilder("Technology");

                   String s1=sb1.toString();

                   String s2=sb2.toString();

                   System.out.println(s1+" "+s2);

          }

}

Output:
Silan Technology

StringConversion1.java

class StringConversion1

{

          public static void main(String[] args)

          {

                   StringBuffer sb1=new StringBuffer("Silan");

                   StringBuffer sb2=new StringBuffer("Silan");

                   String s1=sb1.toString();

                   String s2=sb2.toString();

                   if(s1.equals(s2))

                   {

                             System.out.println("s1 and s2 contents are equal");

                   }

                   else

                   {

                             System.out.println("s1 and s2 contents are not equal");

                   }

          }

}

Output:
s1 and s2 contents are equal

JAVA : How to generate OTP

OtpExample.java

package java8s;

import java.util.*;

public class OtpExample {

    

     static char[] show(int len)

    { 

        System.out.print("Your OTP is : ");

 

        String numbers = "0123456789";

 

        Random rd = new Random();

 

        char[] otp = new char[len];

 

        for (int i = 0; i < len; i++)

        {

            

            otp[i] =

             numbers.charAt(rd.nextInt(numbers.length()));

        }

        return otp;

    }

     public static void main(String[] args) {

          

           int length = 5;

        System.out.println(show(length));

     }

}

Output:

Your OTP is : 35838

Thanks & Regards:

Trilochan Tarai

SILAN Technology & java8s.com

+91-9658317757

JAVA : How to generate password

//JAVA source code to generate random password

PasswordExample.java

package java8s;

import java.util.*;

public class PasswordExample {

     public static void main(String[] args) {

          

           int length = 10;

        System.out.println(silanPassword(length));

          

     }

    

     static char[] silanPassword(int len)

    {

        System.out.print("Your new password is : ");

 

       

        String uchars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

        String lchars = "abcdefghijklmnopqrstuvwxyz";

        String numbers = "0123456789";

        String symbols = "!@#$%^&*_=+-/.?<>)";

 

 

        String values = uchars + lchars +

                        numbers + symbols;

 

        

        Random rd = new Random();

 

        char[] password = new char[len];

 

        for (int i = 0; i < len; i++)

        {

           

            password[i] =

              values.charAt(rd.nextInt(values.length()));

 

        }

        return password;

    }

}

Output:

Your new password is : mR!XPdfVmg

Note : Here we have used random() to generate the password. It may change every time due to use of random() method.

Thanks & Regards:'

Trilochan Tarai

SILAN Technology & java8s.com

0674-2361252