Java Eclipse Class Comparing Marks And Displaying Who Failed -

in code want compare 4 test students , display failed. need in failed class. topper class fine.

import java.io.ioexception; import java.util.arraylist; import java.util.scanner;  public class studentclass {  static arraylist<student> list = new arraylist<student>();  static void student() {  student topper = list.get(0); for(int i=1;i<list.size();++i){ if(topper.marks<list.get(i).marks){ topper = list.get(i); } } system.out.println("tooper : "+topper.name);  }  static void failed1(){  if(list.get(i)<=35 ){ } }   // system.out.println("this student failed" +);    public static void main(string[] args) { // todo auto-generated method stub  student s = new student(); s.name = "test 1"; s.roolno = 1; s.marks = 30.5f;  list.add(s); student x = new student(); x.name = "test 2"; x.roolno = 2; x.marks = 32.5f;  list.add(x); student y = new student(); y.name = "test 3"; y.roolno = 3; y.marks = 80.5f;  list.add(y); student z = new student(); z.name = "test 4"; z.roolno = 4; z.marks = 90.5f;  list.add(z); printmainmenu(); }  private static void printmainmenu() { system.out.println("** main menu **"); system.out.println("1.topper"); system.out.println("2. student failed"); system.out.println("3.exit"); system.out.println("\nenter choice"); scanner in = new scanner(system.in); int ch = in.nextint(); switch (ch) { case 1: student(); break; case 2: failed1(); break; case 3: system.exit(0); default: system.out.println("enter vaild press enter continue"); try { system.in.read();  clear(); printmainmenu(); } catch (ioexception e) { e.setstacktrace(null); }  break;  } }  private static void clear() { // todo auto-generated method stub  }  private static void failed() { // todo auto-generated method stub  }  } // private static void entering(string string) { // todo auto-generated method stub 

there couple ways can checks. simplest of course manual check

    arraylist<student> failedstudents = new arraylist<student>();      (student student : studentlist)     {         if (student.getmark() < passmark )         {             failedstudents.add(student);           }     } 

you can implement priorityqueue comparator class orders student objects marks.