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Array Operations
Last Updated : 26 May, 2026
title: Array Operations
Fundamentals30 words8 headingsExamples included
title: Array Operations description: Arrays class se important operations
java.util.Arrays Class
java exampleWoHoTech
import java.util.Arrays;
int[] arr = {5, 2, 8, 1, 9, 3};Sort karna
java exampleWoHoTech
Arrays.sort(arr);
// arr: {1, 2, 3, 5, 8, 9}
// Partial sort (index 1 to 4)
Arrays.sort(arr, 1, 4);Binary Search
java exampleWoHoTech
Arrays.sort(arr); // pehle sort karna zaruri
int index = Arrays.binarySearch(arr, 5); // 5 ka index dhundhoArray Fill
int[] filled = new int[5];
Arrays.fill(filled, 0); // sabko 0 se fill karo
Array Equals
java exampleWoHoTech
int[] a = {1, 2, 3};
int[] b = {1, 2, 3};
System.out.println(Arrays.equals(a, b)); // trueArray to String
int[] arr = {1, 2, 3};
System.out.println(Arrays.toString(arr)); // [1, 2, 3]
int[][] mat = {{1,2},{3,4}};
System.out.println(Arrays.deepToString(mat)); // [[1, 2], [3, 4]]
Array Copy
java exampleWoHoTech
int[] original = {1, 2, 3, 4, 5};
int[] copy1 = Arrays.copyOf(original, 3); // {1, 2, 3}
int[] copy2 = Arrays.copyOfRange(original, 1, 4); // {2, 3, 4}System.arraycopy()
int[] src = {1, 2, 3, 4, 5};
int[] dest = new int[5];
System.arraycopy(src, 0, dest, 0, 5);
Exam Focus
Revise definitions, diagrams, examples, and short-answer points for Array Operations.
Interview Use
Prepare one clear explanation, one practical example, and one common mistake for this Java topic.
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FundamentalsArrays in Javatitle: Array IntroductionFundamentalsArray Practice Programstitle: Array ProgramsFundamentalsJagged Arraytitle: Jagged Array in JavaFundamentalsMulti-Dimensional Arraystitle: Multi Dimensional ArrayFundamentalsOne Dimensional Arraytitle: One Dimensional ArrayFundamentalsArray Interview Questionstitle: Array Interview Questions