How to Deep Copy a 2D Boolean Array in Java?

Deep Copying 2D Arrays in Java

In Java, cloning a 2D array using the clone() method does not create a deep copy. As a result, changes made to cloned arrays may inadvertently affect the original array. This article explores methods to perform a deep copy of a 2D boolean array.

Iterating Over the Array

One approach is to manually iterate over the array and create a new array by copying the values. For each inner array, you can use System.arraycopy() to ensure a deep copy.

Using Java 6 Arrays.copyOf()

If you are using Java 6 or later, consider utilizing the Arrays.copyOf() method. This method can be used to create a deep copy of arrays of primitive types, including boolean arrays:

public static boolean[][] deepCopy(boolean[][] original) {
    if (original == null) {
        return null;
    }
    final boolean[][] result = new boolean[original.length][];
    for (int i = 0; i < original.length; i++) {
        result[i] = Arrays.copyOf(original[i], original[i].length);
    }
    return result;
}

This code iterates over the original array, creating a new array for each inner array and using Arrays.copyOf() to copy the values. This ensures the creation of a deep copy, where modifications to the new array do not affect the original array.

The above is the detailed content of How to Deep Copy a 2D Boolean Array in Java?. For more information, please follow other related articles on the PHP Chinese website!