JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: Write a program to create deadlock between two threads.


Description:

Deadlock describes a situation where two or more threads are blocked forever, waiting for each other. Deadlocks can occur in Java when the synchronized keyword causes the executing thread to block while waiting to get the lock, associated with the specified object. Since the thread might already hold locks associated with other objects, two threads could each be waiting for the other to release a lock. In such case, they will end up waiting forever.


Code:
package com.java2novice.algos;

public class MyDeadlock {

	String str1 = "Java";
	String str2 = "UNIX";
	
	Thread trd1 = new Thread("My Thread 1"){
		public void run(){
			while(true){
				synchronized(str1){
					synchronized(str2){
						System.out.println(str1 + str2);
					}
				}
			}
		}
	};
	
	Thread trd2 = new Thread("My Thread 2"){
		public void run(){
			while(true){
				synchronized(str2){
					synchronized(str1){
						System.out.println(str2 + str1);
					}
				}
			}
		}
	};
	
	public static void main(String a[]){
		MyDeadlock mdl = new MyDeadlock();
		mdl.trd1.start();
		mdl.trd2.start();
	}
}
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List Of All Interview Programs:

  1. How to reverse Singly Linked List?
  2. Find out duplicate number between 1 to N numbers.
  3. Find out middle index where sum of both ends are equal.
  4. Write a singleton class.
  5. Write a program to create deadlock between two threads.
  6. Write a program to reverse a string using recursive algorithm.
  7. Write a program to reverse a number.
  8. Write a program to convert decimal number to binary format.
  9. Write a program to find perfect number or not.
  10. Write a program to implement ArrayList.
  11. Write a program to find maximum repeated words from a file.
  12. Wrie a program to find out duplicate characters in a string.
  13. Write a program to find top two maximum numbers in a array.
  14. Write a program to sort a map by value.
  15. Write a program to find common elements between two arrays.
  16. How to swap two numbers without using temporary variable?
  17. Write a program to print fibonacci series.
  18. Write a program to find sum of each digit in the given number using recursion.
  19. Write a program to check the given number is a prime number or not?
  20. Write a program to find the given number is Armstrong number or not?
  21. Write a program to convert binary to decimal number.
  22. Write a program to check the given number is binary number or not?
  23. Write a program for Bubble Sort in java.
  24. Write a program for Insertion Sort in java.
  25. Write a program to implement hashcode and equals.
  26. How to get distinct elements from an array by avoiding duplicate elements?
  27. Write a program to get distinct word list from the given file.
  28. Write a program to get a line with max word count from the given file.
  29. Write a program to convert string to number without using Integer.parseInt() method.
  30. Write a program to find two lines with max characters in descending order.
  31. Write a program to find the sum of the first 1000 prime numbers.
  32. Find longest substring without repeating characters.
  33. Write a program to remove duplicates from sorted array.
  34. How to sort a Stack using a temporary Stack?
Knowledge Centre
Class, Constructor and Primitive data types
Class is a template for multiple objects with similar features and it is a blue print for objects. It defines a type of object according to the data the object can hold and the operations the object can perform. Constructor is a special kind of method that determines how an object is initialized when created. Primitive data types are 8 types and they are: byte, short, int, long, float, double, boolean, char.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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