1. Collections 的使用更新

#bysocket

Author: JeffLi1993

src/org/javacore/collection/util/CollectionsT.java

@@ -28,21 +28,33 @@ public class CollectionsT{
 	public static void main(String[] args){
 		// 测试集合工具类Sort方法
 		testSort();
+		testAddAll();
 	}
 
 	/**
 	 * 测试集合工具类Sort方法
 	 */
-	private static void testSort(){
-		List<Integer> teams = new ArrayList<Integer>();
-		teams.add(1);
-		teams.add(3);
-		teams.add(2);
-		teams.add(4);
-		// 调用集合工具类Sort方法
-		Collections.sort(teams);
-		
-		System.out.println("Teams:");
-		System.out.print("\t" + teams + "\n");
-	}
+private static void testSort(){
+	List<Integer> list = new ArrayList<Integer>();
+	list.add(1);
+	list.add(3);
+	list.add(2);
+	list.add(4);
+	// 调用集合工具类Sort方法
+	Collections.sort(list);
+
+	System.out.println("list sorted:");
+	System.out.print("\t" + list + "\n");
+}
+
+private static void testAddAll() {
+	List<String> list = new ArrayList<>();
+	list.add("s2");
+	list.add("s4");
+	list.add("s1");
+	list.add("s3");
+	System.out.println(list);
+	Collections.addAll(list, "s5","s7",null,"s9");
+	System.out.println(list);
+}
 }