Restore

PastAssignments/Assignment4/Assignment4_2230026071/Question1/src/Course.java

@@ -0,0 +1,37 @@
+
+public abstract class Course {
+	//the Course class should be abstract as it contains abstract method
+	
+	//instance variables
+	private String code;
+	private String title;
+	private Course preRequisite;
+	
+	//constructor
+	public Course(String code, String title, Course preRequisite) {
+		if(preRequisite != null) {
+			this.code = code;
+			this.title = title;
+			this.preRequisite = preRequisite;
+		}
+		else {
+			System.out.println("pre-requisite course cannot null!");
+			return;
+		}
+	}
+	
+	//methods
+	public String getCode() {return this.code;}
+	
+	public String getTitle() {return this.title;}
+	
+	public Course getPreRequisite() {return this.preRequisite;}
+	
+	//isRequired() should be abstract as the course are undefined
+	public abstract boolean isRequired();
+	
+	//test
+	public static void testCourse() {
+		// Since we cannot create any Course object, the testCourse method of the Course class must be empty.
+	}
+}

PastAssignments/Assignment4/Assignment4_2230026071/Question1/src/Start.java

@@ -0,0 +1,6 @@
+
+public class Start {
+	public static void main(String[] args) {
+		Course.testCourse();
+	}
+}