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Java 创建深拷贝

欢马劈雪

工程师 (已认证)

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创建深拷贝

实例源码：

源代码：

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public class CloneTest2

{

public static void main(String[] args)

{//from N o w  J a v a  . c o m

Employee emp1 = new Employee("M", "A");

emp1.setSalary(40000.0);

emp1.address = new Address("1300 N. Main Street","New York", "CA", "99999");

Employee emp2 = (Employee)emp1.clone();

System.out.println("**** after cloning ****\n");

printEmployee(emp1);

printEmployee(emp2);

emp2.setLastName("S");

emp2.address = new Address("2503 N. 6th Street","L.A.", "CA", "93722");

/*来自 
     时代Java公众号*/

System.out.println(

"**** after changing emp2 ****\n");

printEmployee(emp1);

printEmployee(emp2);

}

private static void printEmployee(Employee e)

{

System.out.println(e.getFirstName() + " " + e.getLastName());

System.out.println(e.address.getAddress());

System.out.println("Salary: " + e.getSalary());

System.out.println();

}

class Employee implements Cloneable

{

private String lastName;

private String firstName;

private Double salary;

public Address address;

public Employee(String lastName, String firstName)

{

this.lastName = lastName;

this.firstName = firstName;

this.address = new Address();

}

public String getLastName()

{

return this.lastName;

}

public void setLastName(String lastName)

{

this.lastName = lastName;

}

public String getFirstName()

{

return this.firstName;

}

public void setFirstName(String firstName)

{

this.firstName = firstName;

}

public Double getSalary()

{

return this.salary;

}

public void setSalary(Double salary)

{

this.salary = salary;

}

public Object clone()

{

Employee emp;

try

{

emp = (Employee) super.clone();

emp.address = (Address)address.clone();

}

catch (CloneNotSupportedException e)

{

return null;   // will never happen

}

return emp;

}

public String toString()

{

return this.getClass().getName() + "["

+ this.firstName + " "

+ this.lastName + ", "

+ this.salary + "]";

}

class Address implements Cloneable

{

private String street;

private String city;

private String state;

private String zipCode;

public Address()

{

this.street = "";

this.city = "";

this.state = "";

this.zipCode = "";

}

public Address(String street, String city,

String state, String zipCode)
/**代码未完, 请加载全部代码(NowJava.com).**/

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编辑于 2020-03-26 09:23:272020-03-26 09:23:27

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