18. Getters and Setters

Getters and Setters are often used to access private variables, these variables being visible to class where they are defined.

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Once the private variables are declared, we can use the Generate Getters and Setters menu. This screenshot uses Eclipse. However, Netbeans has a similar menu option. We will use Netbeans later, as the jMonkey SDK is based on Netbeans.

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Getters and Setters can have any access type, except private. It is usually public or default (no access keyword given). It can also be protected. We will cover protected later.

// Ex18.java
package com.javaAndroid.ex18;

public class Ex18 {
 private int a,b;
 private String s;
 public static void main(String[] args) {
  (new Ex18a()).ex18a();
 }
 // Getters and Setters
 public int getA() {
  return a;
 }
 public void setA(int a) {
  this.a = a;
 }
 public int getB() {
  return b;
 }
 public void setB(int b) {
  this.b = b;
 }
 public String getS() {
  return s;
 }
 public void setS(String s) {
  this.s = s;
 }
}

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The main() method calls the method ex18a() in class Ex18a. Here the Getters and Setters are tested.

// Ex18a.java
package com.javaAndroid.ex18;

class Ex18a {
 void ex18a() {
  Ex18 o1 = new Ex18();
  o1.setA(5);
  o1.setB(10);
  o1.setS("Hello JavaWorld!");
  System.out.printf(" a = %d, b = %d, s = %s",
    o1.getA(),o1.getB(),o1.getS());
 }
}

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