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How to delete elements from an array?
To delete an element at a particular position from an array. Starting from the required position, replace the element in the current position with the element in the next position.
Example
public class DeletingElementsBySwapping {
public static void main(String args[]) {
int [] myArray = {23, 93, 56, 92, 39};
System.out.println("hello");
int size = myArray.length;
int pos = 2;
for (int i = pos; i<size-1; i++) {
myArray[i] = myArray[i+1];
}
for (int i=0; i<size-1; i++) {
System.out.println(myArray[i]);
}
}
}Output
hello 23 93 92 39
Alternate solution
Apache Commons provides a library named org.apache.commons.lang3 and, following is the maven dependency to add the library to your project.
<dependencies> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.0</version> </dependency> </dependencies>
This package provides a class known as ArrayUtils. Using the remove()method of this class instead of swapping elements, you can delete them.
Example
import java.util.Arrays;
import org.apache.commons.lang3.ArrayUtils;
public class DeletingElements {
public static void main(String args[]) {
int [] myArray = {23, 93, 56, 92, 39};
int [] result = ArrayUtils.remove(myArray, 2);
System.out.println(Arrays.toString(result));
}
}Output
[23, 93, 92, 39]
Updated on: 16-Jun-2020
1K+ Views
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