用Java复制对象

class MyClass implements Cloneable {
    private int myField;

    public MyClass(int myField) {
        this.myField = myField;
    }

    @Override
    public Object clone() {
        try {
            return super.clone();
        } catch (CloneNotSupportedException e) {
            e.printStackTrace();
            return null;
        }
    }
}

MyClass obj1 = new MyClass(10);
MyClass obj2 = (MyClass) obj1.clone();

class MyClass {
    private int myField;

    public MyClass(int myField) {
        this.myField = myField;
    }

    public MyClass(MyClass other) {
        this.myField = other.myField;
    }
}

MyClass obj1 = new MyClass(10);
MyClass obj2 = new MyClass(obj1);

import java.io.*;

class MyClass implements Serializable {
    private int myField;

    public MyClass(int myField) {
        this.myField = myField;
    }
}

MyClass obj1 = new MyClass(10);
try {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    ObjectOutputStream out = new ObjectOutputStream(bos);
    out.writeObject(obj1);
    out.flush();

    ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
    ObjectInputStream in = new ObjectInputStream(bis);
    MyClass obj2 = (MyClass) in.readObject();
} catch (IOException | ClassNotFoundException e) {
    e.printStackTrace();
}