test/testlibrary/jdk/test/lib/Utils.java

@@ -39,10 +39,12 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Iterator;
+import java.util.Map;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Random;
 import java.util.function.BooleanSupplier;
 import java.util.concurrent.TimeUnit;
 import java.util.function.Consumer;

@@ -592,7 +594,27 @@
         if (!type.isArray()) {
             return "L" + result + ";";
         }
         return result;
     }
+
+    public static Object[] getNullValues(Class<?>... types) {
+        Object[] result = new Object[types.length];
+        int i = 0;
+        for (Class<?> type : types) {
+            result[i++] = NULL_VALUES.get(type);
+        }
+        return result;
+    }
+    private static Map<Class<?>, Object> NULL_VALUES = new HashMap<>();
+    static {
+        NULL_VALUES.put(boolean.class, false);
+        NULL_VALUES.put(byte.class, (byte) 0);
+        NULL_VALUES.put(short.class, (short) 0);
+        NULL_VALUES.put(char.class, '\0');
+        NULL_VALUES.put(int.class, 0);
+        NULL_VALUES.put(long.class, 0L);
+        NULL_VALUES.put(float.class, 0.0f);
+        NULL_VALUES.put(double.class, 0.0d);
+    }
 }