import java.text.DecimalFormat; import java.util.ArrayList;

public class Student {

// Declare the variables

private String name; private ArrayList homeworks;

// Constructor with one argument

public Student(String name) { this.name = name; this.homeworks = new ArrayList(); }

// setter or mutator methods change the field values public void setName(String name) { this.name = name; }

//Accessor or getter methods provide the field values public String getName() { return name; }

public void addHomeworkGrade(int newGrade){ this.homeworks.add(newGrade); }

//average homework score public double getComputeAverage(){ int total = 0; //loop through homeworks, add to total for(Integer grade : this.homeworks){ total += grade; }

//calculate average double average = total / (double)this.homeworks.size(); return average; }

//Override the toString method to return the string representation public String toString() { DecimalFormat pattern = new DecimalFormat("0.00"); return (getName() + "'s average grade is " + pattern.format(getComputeAverage()));

}
}
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import java.io.FileReader; import java.io.BufferedReader; import java.io.FileNotFoundException; import java.io.IOException; import java.util.HashMap; import java.util.Iterator; import java.util.LinkedList; import java.util.Queue; import java.util.Set; import java.util.StringTokenizer;

public class Test {

public static void main(String[] args) { String inputFileName = "data.txt"; FileReader fileReader = null; // Create the FileReader object try { fileReader = new FileReader(inputFileName); } catch (FileNotFoundException e) { e.printStackTrace(); }

Queue studentQueue = new LinkedList(); HashMap studentMap = new HashMap();