Initial Commit

Java/StudentLedger/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

Java/StudentLedger/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>StudentLedger</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

Java/StudentLedger/.settings/org.eclipse.jdt.core.prefs

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+#Sun Jan 22 14:47:15 EST 2012
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.6
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.6

Java/StudentLedger/src/Ledger.java

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+/**
+ * @author Twenty Codes, LLC
+ * @author ricky barrette
+ * @date Nov 21, 2010
+ */
+
+import java.util.ArrayList;
+
+/**
+ * this will be a student ledger for grading students
+ * @author ricky barrette
+ */
+public class Ledger {
+
+	private ArrayList<Integer> mGradeList;
+	private String mStudentName;
+
+	/**
+	 * 
+	 * Creates a new Ledger
+	 * @param studentName
+	 * @author ricky barrette
+	 */
+	public Ledger(String studentName) {
+		mGradeList = new ArrayList<Integer>();
+		mStudentName = studentName;
+	}
+
+	/**
+	 * Creates a new Ledger
+	 * @param studentName
+	 * @param gradeList
+	 * @author ricky barrette
+	 */
+	public Ledger(String studentName, ArrayList<Integer> gradeList) {
+		mGradeList = new ArrayList<Integer>();
+		addGrades(gradeList);
+		mStudentName = studentName;
+	}
+	
+	/**
+	 * Creates a new Ledger
+	 * @param studentName
+	 * @param gradeList
+	 * @author ricky barrette
+	 */
+	public Ledger(String studentName, int[] gradeList) {
+		mGradeList = new ArrayList<Integer>();
+		addGrades(gradeList);
+		mStudentName = studentName;
+	}
+	
+	/**
+	 * Adds grades from an array
+	 * @param gradeList
+	 * @return the list of invalid grades, or null
+	 * @author ricky barrette
+	 */
+	public ArrayList<Integer> addGrades (int[] gradeList){
+		ArrayList<Integer> badList = new ArrayList<Integer>();
+		for(int item : gradeList){
+			if(! addGrade(item)){
+				badList.add(item);
+			}
+		}
+		if(badList.size() != 0)
+			return badList;
+		return null;
+	}
+	
+	/**
+	 * adds grades from a list
+	 * @param gradeList
+	 * @return the list of inValid grades, or null
+	 * @author ricky barrette
+	 */
+	public ArrayList<Integer> addGrades (ArrayList<Integer> gradeList){
+		ArrayList<Integer> badList = new ArrayList<Integer>();
+		for(int item : gradeList){
+			if(! addGrade(item)){
+				badList.add(item);
+			}
+		}
+		if(badList.size() != 0)
+			return badList;
+		return null;
+	}
+	
+	/**
+	 * adds a new grade to the grade list if valid
+	 * @param newGrade
+	 * @return true if the grade was added
+	 * @author ricky barrette
+	 */
+	public boolean addGrade(int newGrade){
+		if(newGrade >= 0 && newGrade <= 100){
+			mGradeList.add(newGrade);
+			return true;
+		}
+		System.out.println(newGrade +" is an invalid grade");
+		return false;
+	}
+	
+	/**
+	 * gets all the grades for this student
+	 * @return an array containing all the grades
+	 * @author ricky barrette
+	 */
+	public ArrayList<Integer> getGrades(){
+		return mGradeList;
+	}
+	
+	/**
+	 * returns the name of the student
+	 * @return student's name
+	 * @author ricky barrette
+	 */
+	public String getStudentName(){
+		return mStudentName;
+	}
+	
+	/**
+	 * computes the average grade of the student
+	 * @return the students current average
+	 * @author ricky barrette
+	 */
+	public int getAverage(){
+		int total = 0;
+		int count;
+		for(count = 0; count < mGradeList.size(); count++){
+			total = total + mGradeList.get(count);
+		}
+		return total / count;
+	}
+}

Java/StudentLedger/src/Students.java

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+/**
+ * @author Twenty Codes, LLC
+ * @author ricky barrette
+ * @date Nov 22, 2010
+ */
+
+/**
+ * this will be the driver class to test the Ledger
+ * @author ricky barrette
+ */
+public class Students {
+	
+	private int[] startingGrades = new int[] { 90, 75, 100, 60, 90, 92, 96, 100, 42, 100 };
+
+	/**
+	 * Creates a new Students
+	 * @author ricky barrette
+	 */
+	public Students() {
+		Ledger student1 = new Ledger("Student 1", startingGrades);
+		
+		
+		System.out.println(student1.getAverage());
+		
+		student1.addGrade(100);
+		System.out.println(student1.getAverage());
+		
+		int[] semester2 = new int[] { 90, 80, 70, 100, 101, 90, 90 };
+		System.out.println(student1.addGrades(semester2).get(0));
+		System.out.println(student1.getAverage() +"\n");
+		
+		for(int item : student1.getGrades()){
+			System.out.print(item+", ");
+		}
+		
+		System.out.println("\n"+student1.getAverage());
+		
+	}
+
+	/**
+	 * main method, called when the application starts
+	 * @param args
+	 * @author ricky barrette
+	 */
+	public static void main(String[] args) {
+		new Students();
+	}
+
+}