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                # Java `ArrayList add()`方法 > 原文: [https://beginnersbook.com/2013/12/java-arraylist-add-method-example/](https://beginnersbook.com/2013/12/java-arraylist-add-method-example/) 這里我們討論`Java.util.ArrayList`類的`add()`方法。此方法用于向`ArrayList`添加元素。以下是方法簽名: `public boolean add(Object element)` 例 ```java package beginnersbook.com; import java.util.ArrayList; public class Details { public static void main(String[] args) { //ArrayList<String> Declaration ArrayList<String> al= new ArrayList<String>(); //add method for String ArrayList al.add("Ram"); al.add("Shyam"); al.add("CPS"); al.add("John"); al.add("Steve"); System.out.println("Elements of ArrayList of String Type: "+al); //ArrayList<Integer> Declaration ArrayList<Integer> al2 = new ArrayList<Integer>(); //add method for integer ArrayList al2.add(1); al2.add(34); al2.add(99); al2.add(99); al2.add(78); System.out.println("Elements of ArrayList of Integer Type: "+al2); } } ``` 輸出: ```java Elements of ArrayList of String Type: [Ram, Shyam, CPS, John, Steve] Elements of ArrayList of Integer Type: [1, 34, 99, 99, 78] ``` #### 參考: [`ArrayList.add(E)`](https://docs.oracle.com/javase/6/docs/api/java/util/ArrayList.html#add(E))
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