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Precondition to check if the list passed as parameter is empty or not. Let us see an example −Examplepublic void my_fun(List myList){ if (myList == null){ throw new IllegalArgumentException("List is null"); } if (myList.isEmpty()){ throw new IllegalArgumentException("List is empty"); } my_fun(myList); }A void function named ‘my_fun’ is defined that takes a list of objects as its parameters. If the list is null, it prints the relevant message. If the list has no elements in it, a specific message is displayed. The function is called by passing the list as ... Read More
Example Live Demopublic class Main{ static volatile boolean exit = false; public static void main(String[] args){ System.out.println("Starting the main thread"); new Thread(){ public void run(){ System.out.println("Starting the inner thread"); while (!exit){ } System.out.println("Exiting the inner thread"); } }.start(); try{ Thread.sleep(100); } catch (InterruptedException e){ ... Read More
Joiner provides various methods to handle joining operations on string, objects, etc. Let us see an example −Exampleimport com.google.common.base.Joiner; import java.util.*; public class Demo{ public static void main(String[] args){ String[] my_arr = { "hel", null, "lo", "wo", "r", null, "ld" }; System.out.println("The original array is : "+ Arrays.toString(my_arr)); String my_result = Joiner.on('+').skipNulls().join(my_arr); System.out.println("The joined string is : " + my_result); } }OutputThe original array is [hel, null, lo, wo, r, null, ld] The joined string is hel+lo+wo+r+ldA class named Demo contains the main function, which defines ... Read More
To print single and multiple variables in Java, the code is as follows −Example Live Demopublic class Demo { public static void main(String args[]){ String name_1 = "Hello"; String name_2 = "World"; System.out.println("Printing single variable"); System.out.printf("%s", name_1); System.out.println("Printing multiple variables"); System.out.printf("First Name: %sLast Name: %s",name_1, name_2); } }OutputPrinting single variable Hello Printing multiple variables First Name: Hello Last Name: WorldA class named Demo contains the main function, which defines two strings. These strings are displayed using the ‘println’ function and using the ‘printf’ function.
To convert floating to binary, the Java code is as follows −Example Live Demoimport java.io.*; public class Demo { static void decimal_to_bin(int n){ int[] bin_num = new int[50]; int i = 0; while (n > 0){ bin_num[i] = n % 2; n = n / 2; i++; } for (int j = i - 1; j >= 0; j--) System.out.print(bin_num[j]); } public static void main (String[] args){ ... Read More
Following is an example showing widening primitive conversion −Example Live Demopublic class Demo { public static void main(String[] args) { System.out.print("H" + "E"); System.out.print('L'); System.out.print('L'); System.out.print('O'); } }OutputHELLOA class named Demo contains the main function. Here, the ‘print’ function is used to print specific characters in double quotes and then in single quotes. When the process of widening primitive conversion happens, the presence of ‘+’ operator is a must. This ‘+’ operator expects integer on both the left hand and right hand sides.
Yes, we can do that. Let us see an example −Example Live Democlass my_thread extends Thread{ public void run(){ try{ System.out.println ("The thread " + Thread.currentThread().getId() + " is currently running"); } catch (Exception e){ System.out.println ("The exception has been caught"); } } } public class Main{ public static void main(String[] args){ int n = 6; for (int i=1; i
When the concept of multithreading is implemented, it is possible that changes made by one thread wouldn’t be visible to the other thread. This indicates that the view of each thread is inconsistent with respect to each other. This is known as memory consistency error.CPU might initiate main memory access in a different order, whereas the threads might access them in a different order.This is usually true when write operation is being performed, thereby avoiding the CPU wait time.The write operation is an atomic one, meaning no other operation would be performed by other threads when a write operation is ... Read More
Let us see an example to understand the concept of Thread Interference error −Example Live Demoimport java.io.*; class Demo_instance{ static int val_1 = 6; void increment_val(){ for(int j=1;j
When Google Chrome broke out on our computer screens, it created a new way to see the internet. It was fast, stable, secure and had beautiful themes. It added tabs and also went undercover for us in the incognito mode, it protected us by automatically blocking malicious websites as well.The new Chrome 45 is fierce fighter equipped with silver bullets in all its cylinder chambers, and boy, does it come out all guns blazing!Automatically pauses Flash contentAuto-playing Flash ads consume a lot of battery power as they require substantial processing power to run. And they slow down the web page ... Read More