import java.util.Vector;
public class MScResults {
	private Vector results;
	public MScResults(){
		results = new Vector();
	}
	private MScResult findResult(Integer id){
		for(int i=0; i<this.results.size(); i++){ MScResult r = (MScResult)this.results.elementAt(i); if (r.id == id.intValue()){ return r; } } MScResult r = new MScResult(); this.results.add(r); r.id = id.intValue(); return r; } public void setNames(Integer id, String name){ MScResult r = this.findResult(id); r.name = name; } public void storeMark(Integer id, Float mark){ MScResult r = this.findResult(id); r.mark = mark.floatValue(); } public Float getMark(Integer id){ MScResult r = this.findResult(id); return new Float(r.mark); } public Integer getNoOfStudents(Float lo, Float hi){ int c = 0; for(int i=0; i<this.results.size(); i++){ MScResult r = (MScResult)this.results.elementAt(i); if (r.mark> lo.floatValue() && r.mark < hi.floatValue()){ c++; } } return new Integer(c); } public boolean displayLowestMark(){ if (this.results.size() == 0){ return false; } this.displayResultHeader(); this.displayResult(this.getLowestMark()); return true; } public boolean displayHighestMark(){ if (this.results.size() == 0){ return false; } this.displayResultHeader(); this.displayResult(this.getHighestMark()); return true; } public boolean displayResults(){ if (this.results.size() == 0){ return false; } this.displayResultHeader(); for(int i=0; i<this.results.size(); i++){ MScResult r = (MScResult)this.results.elementAt(i); this.displayResult(r); } return true; } private void displayResultHeader(){ System.out.print(this.padStr("Student Name", 20)); System.out.print(this.padStr("Percentage Mark", 20)); System.out.print(this.padStr("Staus/GRADE", 10)); System.out.println(""); } private void displayResult(MScResult r){ System.out.print(this.padStr(r.name, 20)); System.out.print(this.padStr(new Float(r.mark).toString(), 20)); System.out.print(this.padStr(r.getGrade(), 10)); System.out.println(""); } private MScResult getHighestMark(){ MScResult out = (MScResult)this.results.elementAt(0); for(int i=1; i<this.results.size(); i++){ MScResult r = (MScResult)this.results.elementAt(i); if (r.mark> out.mark){
				out = r;
			}
		}
		return out;
	}
	private MScResult getLowestMark(){
		MScResult out = (MScResult)this.results.elementAt(0);
		for(int i=1; i<this.results.size(); i++){ MScResult r = (MScResult)this.results.elementAt(i); if (r.mark < out.mark){ out = r; } } return out; } private String padStr(String s, int len){ while(s.length() < len){ s += ' '; } return s; } } class MScResult { public int id; public String name; public float mark; public String getGrade(){ if (this.mark>= 69.5){
			return "Distinction";
		}
		if (this.mark>= 59.5){
			return "Merit";
		}
		return "Whatever";
	}
}
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