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• ArrayUtil.java

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tk.hongkailiu.test.app.util.ArrayUtil Maven / Gradle / Ivy

package tk.hongkailiu.test.app.util;

public class ArrayUtil {

    public static  void swapItemsAt(T[] array, int i, int j) {
        if (array == null || array.length < 2) {
            return;
        }
        if (array.length - 1 < Math.max(i, j)) {
            throw new IllegalArgumentException(
                "array.length -1: " + (array.length - 1) + " is smaller than max(i,j)" + Math
                    .max(i, j));
        }
        if (i != j) {
            T temp = array[i];
            array[i] = array[j];
            array[j] = temp;
        }
    }
}