feat(base.collection): list utils

getLast, indexOf, lastIndexOf

src/main/java/org/auioc/mcmod/arnicalib/base/collection/ListUtils.java

@@ -0,0 +1,32 @@
+package org.auioc.mcmod.arnicalib.base.collection;
+
+import java.util.List;
+import java.util.function.Predicate;
+import org.apache.commons.lang3.Validate;
+
+public class ListUtils {
+
+    public static <T> T getLast(List<T> list) {
+        Validate.notEmpty(list);
+        return list.get(list.size() - 1);
+    }
+
+    public static <T> int indexOf(List<T> list, Predicate<T> predicate) {
+        for (int i = 0, l = list.size(); i < l; ++i) {
+            if (predicate.test(list.get(i))) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    public static <T> int lastIndexOf(List<T> list, Predicate<T> predicate) {
+        for (int i = list.size() - 1; i >= 0; --i) {
+            if (predicate.test(list.get(i))) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+}