JavaBeans: Difference between revisions

Revision as of 19:22, 7 March 2006

Revision as of 19:44, 7 March 2006

Line 18:

== JavaBean Example ==

<pre>

// PersonBean.java

public class PersonBean implements java.io.Serializable {

private String name;

private int age;

private boolean deceased;

// OurDefault constructor. Note that it (takes no arguments (a default constructor).

public PersonBean() {

// Our constructor. Note that it takes no arguments (a default constructor).

}

public String getName() { return (this.name); }

public int getAge() { return (this.agename); }

}

public void setName(String n) {

this.name = n;

}

// note slightly differentDifferent semantics for a boolean field (*is* vs. *get*)

public voidboolean setAgeisDeceased(int a) {

return (this.age = adeceased);

}

public void setDeceased(boolean deceased) {

this.deceased = deceased;

}

public String getName() { return (this.name); }

public int getAge() { return (this.age); }

// note slightly different semantics for a boolean field (*is* vs. *get*)

public boolean isDeceased() { return (this.deceased); }

}

</pre>

<pre>

PersonBean person = new PersonBean();

// TestPersonBean.java

person.setName("Bob");

person.setAlive(false);

public class TestPersonBean {

System.out.println(person.getName() + (person.isDeceased() ? " [deceased]");

public static void main(String[] args) {

PersonBean person = new PersonBean();

person.setName("Bob");

person.setDeceased(true);

// Output: "Bob [deceased]"

System.out.print(person.getName());

System.out.println(person.getName() + (person.isDeceased() ? " [deceased]" : "");

}

}

</pre>