Fixed null pointer issue

kdgyun · kdgyun · commit c3355e6da862 · 2021-06-05T18:46:18.000+09:00
diff --git a/SortingAlgorithm/Java/Utils/Convert.java b/SortingAlgorithm/Java/Utils/Convert.java
@@ -32,7 +32,7 @@ public static Byte[] toByteArray(byte[] a) {
 
 	private static final Byte[] toByteArray(byte[] a, int size) {
 		if (a == null) {
-			return null;
+			throw new NullPointerException();
 		} else if (size == 0) {
 			return EMPTY_BYTE_OBJECT_ARRAY;
 		}
@@ -66,7 +66,7 @@ public static Character[] toCharacterArray(char[] a) {
 
 	private static final Character[] toCharacterArray(char[] a, int size) {
 		if (a == null) {
-			return null;
+			throw new NullPointerException();
 		} else if (size == 0) {
 			return EMPTY_CHAR_OBJECT_ARRAY;
 		}
@@ -100,7 +100,7 @@ public static Short[] toShortArray(short[] a) {
 
 	private static final Short[] toShortArray(short[] a, int size) {
 		if (a == null) {
-			return null;
+			throw new NullPointerException();
 		} else if (size == 0) {
 			return EMPTY_SHORT_OBJECT_ARRAY;
 		}
@@ -134,7 +134,7 @@ public static Integer[] toIntegerArray(int[] a) {
 
 	private static final Integer[] toIntegerArray(int[] a, int size) {
 		if (a == null) {
-			return null;
+			throw new NullPointerException();
 		} else if (size == 0) {
 			return EMPTY_INT_OBJECT_ARRAY;
 		}
@@ -164,7 +164,7 @@ public static Long[] toLongArray(long[] a) {
 
 	private static final Long[] toLongArray(long[] a, int size) {
 		if (a == null) {
-			return null;
+			throw new NullPointerException();
 		} else if (size == 0) {
 			return EMPTY_LONG_OBJECT_ARRAY;
 		}
@@ -194,7 +194,7 @@ public static Float[] toFloatArray(float[] a) {
 
 	private static final Float[] toFloatArray(float[] a, int size) {
 		if (a == null) {
-			return null;
+			throw new NullPointerException();
 		} else if (size == 0) {
 			return EMPTY_FLOAT_OBJECT_ARRAY;
 		}
@@ -228,7 +228,7 @@ public static Double[] toDoubleArray(double[] a) {
 
 	private static final Double[] toDoubleArray(double[] a, int size) {
 		if (a == null) {
-			return null;
+			throw new NullPointerException();
 		} else if (size == 0) {
 			return EMPTY_DOUBLE_OBJECT_ARRAY;
 		}
