Java by API/java.beans/XMLEncoder

Encoder: setPersistenceDelegate(Class<?> type, PersistenceDelegate persistenceDelegate)

  

import java.beans.DefaultPersistenceDelegate;
import java.beans.XMLEncoder;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
public class Main {
  public static void main(String[] argv) throws Exception {
    MyClass o = new MyClass(123);
    XMLEncoder encoder = new XMLEncoder(new BufferedOutputStream(
        new FileOutputStream("outfilename.xml")));
    String[] propertyNames = new String[] { "prop" };
    encoder.setPersistenceDelegate(MyClass.class,
        new DefaultPersistenceDelegate(propertyNames));
    encoder.writeObject(o);
    encoder.close();
  }
}
class MyClass {
  int prop;
  public MyClass(int prop) {
    this.prop = prop;
  }
  public int getProp() {
    return prop;
  }
}

new XMLEncoder(OutputStream out)

  

import java.beans.XMLEncoder;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import javax.swing.JFrame;
public class Main {
  public static void main(String args[]) {
    JFrame x = new JFrame("Look at me");
    x.setSize(200, 300);
    x.setVisible(true);
    x.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    FileOutputStream f;
    try {
      f = new FileOutputStream("Test.xml");
      XMLEncoder e = new XMLEncoder(new BufferedOutputStream(f));
      e.writeObject(x);
      e.close();
    } catch (Exception e) {
    }
  }
}

XMLEncoder: writeObject(Object o)

  

import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.beans.XMLEncoder;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
public class Main {
  public static void main(String[] argv) throws Exception {
    MyClass o = new MyClass();
    o.setProp(1);
    o.setProps(new int[] { 1, 2, 3 });
    XMLEncoder encoder = new XMLEncoder(new BufferedOutputStream(
        new FileOutputStream("outfilename.xml")));
    encoder.writeObject(o);
    encoder.close();
  }
}
class MyClass {
  int i;
  public int getProp() {
    return i;
  }
  public void setProp(int i) {
    this.i = i;
  }
  int[] iarray = new int[0];
  public int[] getProps() {
    return iarray;
  }
  public void setProps(int[] iarray) {
    this.iarray = iarray;
  }
  static {
    try {
      BeanInfo info = Introspector.getBeanInfo(MyClass.class);
      PropertyDescriptor[] propertyDescriptors = info.getPropertyDescriptors();
      for (int i = 0; i < propertyDescriptors.length; ++i) {
        PropertyDescriptor pd = propertyDescriptors[i];
        if (pd.getName().equals("props")) {
          pd.setValue("transient", Boolean.TRUE);
        }
      }
    } catch (IntrospectionException e) {
    }
  }
}