java创建对象的几种方式

(1) 用new语句创建对象，这是最常见的创建对象的方法。
(2) 运用反射手段,调用java.lang.Class或者java.lang.reflect.Constructor类的newInstance()实例方法。
(3) 调用对象的clone()方法。
(4) 运用反序列化手段，调用java.io.ObjectInputStream对象的 readObject()方法。

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一.用new语句创建对象

public class BeanUtil {@SuppressWarnings("unchecked")public static <T> T cloneTo(T src) throws RuntimeException {ByteArrayOutputStream memoryBuffer = new ByteArrayOutputStream();ObjectOutputStream out = null;ObjectInputStream in = null;T dist = null;try {out = new ObjectOutputStream(memoryBuffer);out.writeObject(src);out.flush();in = new ObjectInputStream(new ByteArrayInputStream(memoryBuffer.toByteArray()));dist = (T) in.readObject();} catch (Exception e) {throw new RuntimeException(e);} finally {if (out != null)try {out.close();out = null;} catch (IOException e) {throw new RuntimeException(e);}if (in != null)try {in.close();in = null;} catch (IOException e) {throw new RuntimeException(e);}}return dist;}public static void main(String[] args){Husband husband = new Husband(1);Wife wife = new Wife(1,"jin");husband.setWife(wife);Husband husband2 = cloneTo(husband);//运用反序列生成了一个对象}}

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