This is an example of how to get and set a bean property. We are using theStatement class.
A Statement object represents a primitive statement in which a single method is applied to a target and a set of arguments. In order to get and set a bean property you should:
- Create a simple class, like
Bean class in the example. It has two String properties and getters and
setters for the properties.
- Create a new object of
Bean class.
- Create a new Statement object
for the specified object to invoke the
setProperty1method and by a String array of arguments.
- Call the
execute() API method of Statement. It finds a method whose name is the same as the methodName property,
and invokes the method on the Bean object.
- Create a new Expression.
An Expression object represents a primitive expression in which a single method is applied to a target and a set of arguments to return a result. The new Expression is created with the specified value for the specified
Bean object
to invoke the getProperty1 method by the array of arguments.
- Call
execute() API method of Expression. It finds a method whose name is the same as the methodName property,
and invokes the method on the Bean object.
- Call
getValue() API method of Expression to get the value of the property set in the Expression.
Let’s take a look at the code snippet that follows:
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package com.javacodegeeks.snippets.core;
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import java.beans.Expression;
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import java.beans.Statement;
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public class GetSetBeanProperty
{
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public static void main(String[]
args) throws Exception
{
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Object
o = new Bean();
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stmt
= new Statement(o, "setProperty1", new Object[]{"My
Prop Value"});
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expr
= new Expression(o, "getProperty1", new Object[0]);
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System.out.println("Property1
value: " +
(String)expr.getValue());
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stmt
= new Statement(o, "setProperty2", new Object[]{new Integer(345)});
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expr
= new Expression(o, "getProperty2", new Object[0]);
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System.out.println("Property2
value: " +
(Integer)expr.getValue());
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public static class Bean
{
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private String
property1;
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private int property2;
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public String
getProperty1() {
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public void setProperty1(String
property1) {
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this.property1
= property1;
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public int getProperty2()
{
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public void setProperty2(int property2)
{
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this.property2
= property2;
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Output:
Property1 value: My Prop Value Property2 value: 345
This was an example of how to get and set a bean property in Java.
