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Java Articles
Page 250 of 450
If a number is read as a String, how to Count the no of times the highest number repeated in the string?\\n a. Ex: 2 4 3 4 2 4 0 -> (3)
To do so, Trim the given string and split it using the split() method (Removing the empty spaces in-between).Create an integer array and in loop convert each element of the string array to an integer using Integer.parseInt() method and assign it to the respective element of the integer array.Sort the obtained integer array, since this method sorts the elements of the array in ascending order the last element will be the maximum of the array. Create an integer variable count with initial value 0. Compare each element of the array with the maximum value, each time a match occurs increment the count. The final value ...
Read MoreHow to store the contents of arrays in a file using Java?
You can use write data into a file using the Writer classes. In the example given below, we are writing the contents of the array using the BufferedWriter.ExampleLive Demoimport java.io.BufferedWriter; import java.io.FileWriter; public class WritingStringArrayToFile { public static void main(String args[]) throws Exception { String[] myArray = {"JavaFX", "HBase", "OpenCV", "Java", "Hadoop", "Neo4j"}; BufferedWriter writer = new BufferedWriter(new FileWriter("myFile.txt", false)); for(int i = 0; i < myArray.length; i++) { writer.write(myArray[i].toString()); writer.newLine(); } writer.flush(); ...
Read MoreHow to convert Java Array to Iterable?
To make an array iterable either you need to convert it to a stream or as a list using the asList() or stream() methods respectively. Then you can get an iterator for these objects using the iterator() method.ExampleLive Demoimport java.util.Arrays; import java.util.Iterator; public class ArrayToIterable { public static void main(String args[]){ Integer[] myArray = {897, 56, 78, 90, 12, 123, 75}; Iterator iterator = Arrays.stream(myArray).iterator(); while(iterator.hasNext()) { System.out.println(iterator.next()); } } }Output897 56 78 90 12 123 75As mentioned above, you can also convert ...
Read MoreHow to count Java comments of a program that is stored in a text file?
You can read the contents of a file using the Scanner class and You can find the comments in a particular line using contains() method.Exampleimport java.io.*; import java.util.Scanner; public class FindingComments { public static void main(String[] args) throws IOException { Scanner sc = new Scanner(new File("HelloWorld")); String input; int single = 0; int multiLine = 0; while (sc.hasNextLine()) { input = sc.nextLine(); if (input.contains("/*")) { multiLine ++; ...
Read MoreHow to use labels in Java code?
Java provides two types of branching/control statements namely, break and continue.The break statementThis statement terminates the loop or switch statement and transfers execution to the statement immediately following the loop or switch.ExampleFollowing is the example of the break statement. Here we are trying to print elements up to 10 and, using break statement we are terminating the loop when the value in the loop reaches 8.Live Demopublic class BreakExample { public static void main(String args[]){ for(int i=0; i
Read MoreWhat are variadic functions in Java?
Methods which uses variable arguments (varargs, arguments with three dots) are known as variadic functions.ExampleLive Demopublic class Sample { void demoMethod(String... args) { for (String arg: args) { System.out.println(arg); } } public static void main(String args[] ){ new Sample().demoMethod("ram", "rahim", "robert"); new Sample().demoMethod("krishna", "kasyap"); } }Outputram rahim robert krishna kasyap
Read MoreJava labelled for loop
Following program is using labeled for loops.ExampleLive Demopublic class Tester { public static void main(String args[]) { first: for (int i = 0; i < 3; i++) { for (int j = 0; j< 3; j++){ if(i == 1){ continue first; } System.out.print(" [i = " + i + ", ...
Read MoreJava labelled for loop
Following program is using labeled for loops.ExampleLive Demopublic class Tester { public static void main(String args[]) { first: for (int i = 0; i < 3; i++) { for (int j = 0; j< 3; j++){ if(i == 1){ continue first; } System.out.print(" [i = " + i + ", ...
Read MoreJava labelled statement
Yes. Java supports labeled statements. You can put a label before a for statement and use the break/continue controls to jump to that label. ExampleSee the example below.Live Demopublic class Tester { public static void main(String args[]) { first: for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++){ if(i == 1){ continue first; ...
Read MoreJava labelled statement
Yes. Java supports labeled statements. You can put a label before a for statement and use the break/continue controls to jump to that label. ExampleSee the example below.Live Demopublic class Tester { public static void main(String args[]) { first: for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++){ if(i == 1){ continue first; ...
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