public class Customer {
private int id;
private String name;
//其他省略 }
//建立测试数据
List<Customer> customers = new ArrayList<>();
customers.add(new Customer(1, "Jack"));
customers.add(new Customer(2, "James"));
customers.add(new Customer(3, "Kelly"));
//实现查找,找到则返回匹配的对象,找不到则返回null
Customer james = customers.stream() .filter(customer -> "James".equals(customer.getName())) .findAny() .orElse(null);