Java ArrayList contains() 方法

示例

检查某个元素是否存在于列表中:

import java.util.ArrayList;

public class Main {
  public static void main(String[] args) {
    ArrayList<String> cars = new ArrayList<String>();
    cars.add("Volvo");
    cars.add("BMW");
    cars.add("Ford");
    cars.add("Mazda");
    System.out.println(cars.contains("BMW"));
    System.out.println(cars.contains("Toyota"));
  }
}

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