Getting and Setting a Property of a Bean - Java Object Oriented Design

Java examples for Object Oriented Design:Java Bean

  1. HOME
  2. Java
  3. Object Oriented Design
  4. Java Bean

Description

Getting and Setting a Property of a Bean

Demo Code


import java.beans.Expression;
import java.beans.Statement;

public class Main {
  public static void main(String[] args) throws Exception {
    Object o = new MyBean();
    try {//from w ww. j av a2  s .  co m
      // Get the value of prop1
      Expression expr = new Expression(o, "getProp1", new Object[0]);
      expr.execute();
      String s = (String) expr.getValue();

      // Set the value of prop1
      Statement stmt = new Statement(o, "setProp1",
          new Object[] { "new string" });
      stmt.execute();

      // Get the value of prop2
      expr = new Expression(o, "getProp2", new Object[0]);
      expr.execute();
      int i = ((Integer) expr.getValue()).intValue();

      // Set the value of prop2
      stmt = new Statement(o, "setProp2", new Object[] { new Integer(123) });
      stmt.execute();

      // Get the value of prop1
      expr = new Expression(o, "getProp3", new Object[0]);
      expr.execute();
      byte[] bytes = (byte[]) expr.getValue();

      // Set the value of prop1
      stmt = new Statement(o, "setProp3", new Object[] { new byte[] { 0x12,
          0x23 } });
      stmt.execute();
    } catch (Exception e) {
    }
  }
}

class MyBean {
  // Property prop1
  String prop1;

  public String getProp1() {
    return prop1;
  }

  public void setProp1(String s) {
    prop1 = s;
  }

  // Property prop2
  int prop2;

  public int getProp2() {
    return prop2;
  }

  public void setProp2(int i) {
    prop2 = i;
  }

  // Property prop3
  byte[] prop3;

  public byte[] getProp3() {
    return prop3;
  }

  public void setProp3(byte[] bytes) {
    prop3 = bytes;
  }
}

Related Tutorials