A bean is simply a class that adheres to the following rules.

• Implements java.io.Serializable
• A public no-argument constructor
• Has getters and setters methods

Let's say you've created a class called Hello.java (in Eclipse in this example). 

This bean will print "John Doe".

package my.pkg;

public class Hello implements java.io.Serializable {
	private static final long serialVersionUID = -3774654564564563L;
	private String name;
	
    public void myName() {
    	name = "John Doe";
    }
	
    // getter
    public String getName() {
        return name;
    }
    
    // setter
    public void setName(String name) {
        this.name = name;
    }
}