Class, Objects, Instance Variable, Functions and Reference Variables

19_class_and_objects.dart

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+void main() {
+
+	var student1 = Student(); 		// One Object, student1 is reference variable
+	student1.id = 23;
+	student1.name = "Peter";
+	print("${student1.id} and ${student1.name}");
+
+	student1.study();
+	student1.sleep();
+
+	var student2 = Student();		// One Object, student2 is reference variable
+	student2.id = 45;
+	student2.name = "Sam";
+	print("${student2.id} and ${student2.name}");
+	student2.study();
+	student2.sleep();
+}
+
+// Define states (properties) and behavior of a Student
+class Student {
+	int id = -1; 			// Instance or Field Variable, default value is -1
+	String name;  		// Instance or Field Variable, default value is null
+
+	void study() {
+		print("${this.name} is now studying");
+	}
+
+	void sleep() {
+		print("${this.name} is now sleeping");
+	}
+}