1. Java Programming with Multiple Classes
Two classes
Three classes
More classes

2. public class ClassTwo{
private int count;
public ClassTwo() {
// constructor
count = 5; }
public void method1() {
count++;
System.out.println(“Method 1:“ + count);
public void method2() {
System.out.println(“Method 2:“+ count);
public void method3() {
System.out.println(“Method 3:“ + count);
public class ClassOne {
public static void main(String[] args)
ClassTwo ctwo = new ClassTwo();
ctwo.method1();
ctwo.method2();
ctwo.method3(); }

3. cThree can only be used in method1()
public class ClassTwo{
private int count;
public ClassTwo() {
// constructor
count = 5; }
public void method1() {
count++;
System.out.println(“Method 1:“ + count);
ClassThree cThree = new ClassThree();
cThree.Class3Method1();
public void method2() {
System.out.println(“Method 2:“+ count);
public void method3() {
System.out.println(“Method 3:“ + count);
public class ClassOne {
public static void main(String[] args)
ClassTwo cTwo = new ClassTwo();
cTwo.method1();
cTwo.method2();
cTwo.method3(); }
cThree can only be used in method1()
public class ClassThree{
private int num;
public ClassThree() {
// constructor
num = 3; }
public void Class3Method1() {
num++;
System.out.println("Class 3 method 1:“ + num);

4. public class ClassTwo{
private int count;
ClassThree cThree;
public ClassTwo() {
// constructor
cThree = new ClassThree();
count = 5; }
public void method1() {
count++;
System.out.println(“Method 1:“ + count);
cThree.Class3Method1();
public void method2() {
System.out.println(“Method 2:“+ count);
public void method3() {
System.out.println(“Method 3:“ + count);
public class ClassOne {
public static void main(String[] args)
ClassTwo cTwo = new ClassTwo();
cTwo.method1();
cTwo.method2();
cTwo.method3(); }
public class ClassThree{
private int num;
public ClassThree() {
// constructor
num = 3; }
public void Class3Method1() {
num++;
System.out.println("Class 3 method 1:“ + num);

5. public class ClassTwo{
private int count;
ClassThree cThree;
public ClassTwo() {
cThree = new ClassThree();
count = 5; }
public void method1() {
count++;
System.out.println(“Method 1:“ + count);
cThree.Class3Method1();
public void method2() {
System.out.println(“Method 2:“+ count);
public void method3() {
System.out.println(“Method 3:“ + count);
public class ClassOne {
public static void main(String[] args)
ClassTwo cTwo = new ClassTwo();
cTwo.method1();
cTwo.method2();
cTwo.method3(); }
public class ClassThree{
private int num;
public ClassThree() {
// constructor
num = 3; }
public void Class3Method1() {
num++;
System.out.println("Class 3 method 1:“ + num);

6. More Classes?