public class CopyPropsToSameType {

  public static void main(String[] args) {
    BeanWrapper bw = new BeanWrapperImpl(new TestBean());
    bw.setPropertyValue("aString", "someString");
    bw.setPropertyValue("anInt", 3);

    TestBean testBean2 = new TestBean();

    BeanUtils.copyProperties(bw.getWrappedInstance(), testBean2);

    System.out.println(testBean2);
  }
}
// TestBean{aString='someString', anInt=3, date=Mon May 01 16:08:07 CDT 2017}

public class CopyPropsToDifferentType {

  public static void main(String[] args) {
    BeanWrapper bw = new BeanWrapperImpl(new TestBean());
    bw.setPropertyValue("aString", "someString");
    bw.setPropertyValue("anInt", 3);

    TestBeanDifferent testBean2 = new TestBeanDifferent();

    //only properties of same name will be copied
    BeanUtils.copyProperties(bw.getWrappedInstance(), testBean2);

    System.out.println(testBean2);
  }

  private static class TestBeanDifferent {
    private String aString;
    private int differentInt;

    public String getAString() {
      return aString;
    }

    public void setAString(String aString) {
      this.aString = aString;
    }

    public int getDifferentInt() {
      return differentInt;
    }

    public void setDifferentInt(int differentInt) {
      this.differentInt = differentInt;
    }

    @Override
    public String toString() {
      return (
        "TestBeanDifferent{" +
        "aString='" +
        aString +
        '\'' +
        ", differentInt=" +
        differentInt +
        '}'
      );
    }
  }
}
// TestBeanDifferent{aString='someString', differentInt=0}

public class PropDescriptorExample {

  public static void main(String[] args) throws IntrospectionException {
    PropertyDescriptor[] actual = Introspector
      .getBeanInfo(TestBean.class)
      .getPropertyDescriptors();
    PropertyDescriptor[] descriptors = BeanUtils.getPropertyDescriptors(
      TestBean.class
    );

    System.out.println(Arrays.toString(actual));
    System.out.println(Arrays.toString(descriptors));
  }
}
// [java.beans.PropertyDescriptor[name=AString; propertyType=class java.lang.String; readMethod=public java.lang.String com.logicbig.example.TestBean.getAString(); writeMethod=public void com.logicbig.example.TestBean.setAString(java.lang.String)], java.beans.PropertyDescriptor[name=anInt; propertyType=int; readMethod=public int com.logicbig.example.TestBean.getAnInt(); writeMethod=public void com.logicbig.example.TestBean.setAnInt(int)], java.beans.PropertyDescriptor[name=class; propertyType=class java.lang.Class; readMethod=public final native java.lang.Class java.lang.Object.getClass()], java.beans.PropertyDescriptor[name=date; propertyType=class java.util.Date; readMethod=public java.util.Date com.logicbig.example.TestBean.getDate()]]

public class ResolveSignature {

  public static void main(String[] args)
    throws InvocationTargetException, IllegalAccessException {
    Method doSomething = BeanUtils.resolveSignature(
      "aMethod(java.lang.String, int)",
      LocalBean.class
    );
    doSomething.invoke(new LocalBean(), "some string value", 100);

    doSomething =
      BeanUtils.resolveSignature("aMethod(java.lang.Integer)", LocalBean.class);
    doSomething.invoke(new LocalBean(), 200);
  }

  private static class LocalBean {

    public void aMethod(String str, int anInt) {
      System.out.println(str);
      System.out.println(anInt);
    }

    public void aMethod(Integer anInt) {
      System.out.println(anInt);
    }
  }
}

/**
    some string value
    100
    200
*/
public class ResolveSignature2 {

  public static void main(String[] args)
    throws InvocationTargetException, IllegalAccessException {
    Method doSomething = BeanUtils.resolveSignature(
      "doSomething",
      LocalBean.class
    );
    doSomething.invoke(new LocalBean());
  }

  private static class LocalBean {

    public void doSomething() {
      System.out.println("-- doing something -- ");
    }
  }
}
// -- doing something --