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Articles on Trending Technologies
Technical articles with clear explanations and examples
Ints join() function in Java
The join() method of Ints class returns a string containing the supplied int values separated by separator. The syntax is as follows −public static String join(String separator, int[] arr)Here, separator parameter is something that should appear between consecutive values, whereas arr is an array of int values.Let us first see an example −Exampleimport com.google.common.primitives.Ints; class Demo { public static void main(String[] args) { int[] myArr = { 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 }; System.out.println(Ints.join("-", myArr)); int index = Ints.indexOf(myArr, 40); if ...
Read MoreInts indexOf() function in Java
The indexOf() method of the Ints class returns the index of the first appearance of the value target in array. The syntax is as follows −public static int indexOf(int[] arr, int target)Here, parameter arr is an array of int values and target is the value to be checked for first appearance.Let us now see an example −Exampleimport com.google.common.primitives.Ints; class Demo { public static void main(String[] args) { int[] arr = { 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 }; int index = Ints.indexOf(arr, 40); if (index != ...
Read MoreProgram to convert Set to List in Java
Let’s say the following is our Set with string values −Set set = new HashSet(); set.add("Laptop"); set.add("Mobile"); set.add("Tablet"); set.add("LCD"); set.add("LED");Now, let us convert it to List −List list = new ArrayList(set);Following is the program to convert Set to List in Java −Exampleimport java.util.*; import java.util.stream.*; public class Demo { public static void main(String args[]) { Set set = new HashSet(); set.add("Laptop"); set.add("Mobile"); set.add("Tablet"); set.add("LCD"); set.add("LED"); set.add("Desktop"); System.out.println("Set = " + set); List ...
Read MoreProgram to convert set of String to set of Integer in Java
Let’s say the following is our set of string −Set setStr = new HashSet(Arrays.asList("50", "100", "150", "200", "250", "300", "500"));Now, convert it to set of Integer −Set setInteger = setStr.stream().map(s -> Integer.parseInt(s)).collect(Collectors.toSet());ExampleFollowing is the program to convert set of String to set of Integer in Java −import java.util.*; import java.util.stream.*; public class Demo { public static void main(String args[]) { Set setStr = new HashSet(Arrays.asList("50", "100", "150", "200", "250", "300", "500")); System.out.println("Set (String) = " + setStr); Set setInteger = setStr.stream().map(s -> Integer.parseInt(s)) .collect(Collectors.toSet()); ...
Read MoreProgram to convert Set of Integer to Set of String in Java
Let’s say the following is our Set of Integer −Set setInteger = new HashSet(Arrays.asList(100, 200, 300, 500, 600, 800, 1000));Now, let us convert this to Set of String −Set setStr = setInteger.stream().map(String::valueOf).collect(Collectors.toSet());ExampleFollowing is the program to convert set of Integer to Set of String in Java −import java.util.*; import java.util.stream.*; import java.util.function.Function; public class Demo { public static void main(String args[]) { Set setInteger = new HashSet(Arrays.asList(100, 200, 300, 500, 600, 800, 1000)); System.out.println("Set = " + setInteger); Set setStr = setInteger.stream().map(String::valueOf).collect(Collectors.toSet()); System.out.println("New Set (String) = " ...
Read MoreProgram to convert set of Integer to Array of Integer in Java
Let’s say the following is our set of Integer −Set set = new HashSet(Arrays.asList(50, 100, 150, 200, 400, 600, 800, 1000, 1200, 1500));Now, convert it to Array of Integer −int[] arr = set.stream() .mapToInt(Integer::intValue) .toArray();ExampleFollowing is the program to convert set of Integer to Array of Integer in Java −import java.util.*; import java.util.stream.*; import java.util.function.Function; public class Demo { public static void main(String args[]) { Set set = new HashSet(Arrays.asList(50, 100, 150, 200, 400, 600, 800, 1000, 1200, 1500)); System.out.println("Set = " + set); int[] arr = set.stream().mapToInt(Integer::intValue).toArray(); System.out.println("Array = "+ Arrays.toString(arr)); } }OutputSet = [400, 800, 1200, 50, 100, 150, 200, 600, 1000, 1500] Array = [400, 800, 1200, 50, 100, 150, 200, 600, 1000, 1500]
Read MoreProgram to convert List of String to List of Integer in Java
Here’s our List of String −List listString = Arrays.asList("25", "50", "75", "100", "125", "150");Now, convert the list of string to list of integer −List listInteger = listString.stream().map(Integer::parseInt).collect(Collectors.toList());Following is the program to convert List of String to List of Integer in Java −Exampleimport java.util.*; import java.util.stream.*; import java.util.function.*; public class Demo { public static void main(String[] args) { List listString = Arrays.asList("25", "50", "75", "100", "125", "150"); System.out.println("List of String = " + listString); List listInteger = listString.stream().map(Integer::parseInt) .collect(Collectors.toList()); System.out.println("List of Integer (converted from ...
Read MoreProgram to convert List of Integer to List of String in Java
Here’s our List of Integer −List listInteger = Arrays.asList(25, 50, 75, 100, 125, 150);Now, convert List of Integer to List of String −List listString = listInteger.stream() .map(s -> String.valueOf(s)) .collect(Collectors.toList());Following is the program to convert List of Integer to List of String in Java −Exampleimport java.util.*; import java.util.stream.*; import java.util.function.*; public class Demo { public static void main(String[] args) { List listInteger = Arrays.asList(25, 50, 75, 100, 125, 150); System.out.println("List of Integer = " + listInteger); List listString = listInteger.stream() .map(s -> String.valueOf(s)) ...
Read MoreInts contains() function in Java
The contains() function of the Ints class is used to check whether an element is present in the array or not.Following is the syntax −public static boolean contains(int[] arr, int target)Here, arr is the array wherein the element is to be checked. The target is the element to be checked.Following is an example to implement the contains() method of the Ints class −Exampleimport com.google.common.primitives.Ints; import java.util.*; class Demo { public static void main(String[] args) { int[] myArr1 = { 100, 150, 230, 300, 400 }; int[] myArr2 = { 450, 550, 700, 800, ...
Read MoreInts concat() function in Java
The concat() function in Ints class is used to concatenate the arrays passed as parameter. The syntax is as follows −public static int[] concat(int[]... arr)Here, parameter arr is zero or more integer arrays.Let us see an example −Exampleimport com.google.common.primitives.Ints; import java.util.*; class Demo { public static void main(String[] args) { int[] myArr1 = { 100, 150, 230, 300, 400 }; int[] myArr2 = { 450, 550, 700, 800, 1000 }; System.out.println("Array 1 = "); for(int i=0; i < myArr1.length; i++) { System.out.println(myArr1[i]); ...
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