Java Collection Framework exercises: The user enters the student's name and score from two text boxes, respectively ....

Write an application in which the user enters the student's name and score from two text boxes, and the program displays the students ' names and scores in a text area, sorted by their score.

Import Java.awt.FlowLayout;
Import java.awt.event.ActionEvent;
Import Java.awt.event.ActionListener;
Import java.util.ArrayList;
Import java.util.Collections;
Import Java.util.Iterator;
Import java.util.List;

Import Javax.swing.Box;
Import Javax.swing.JButton;
Import Javax.swing.JFrame;
Import Javax.swing.JLabel;
Import Javax.swing.JTextArea;
Import Javax.swing.JTextField;

public class Myjframe extends JFrame implements ActionListener {
JFrame Mjframe;
JTextField MJTextField1, MJTextField2;
JTextArea Mjtextarea;

Myjframe () {
Mjframe = new JFrame ("score sort");
Mjframe.setbounds (200, 100, 900, 600);//Setting the window position and window width height
Mjframe.setlayout (New FlowLayout ());//Set the layout of the window
MJTextField1 = new JTextField (10);//explicitly create two text boxes
MJTextField2 = new JTextField (10);
JButton Mjbutton = new JButton ("OK");//Create button
Box MBox = Box.createhorizontalbox ();//Create a horizontal box container
Mbox.add (New JLabel ("name"));//Add an implicitly created label because you do not need to click an event so you can create it implicitly
Mbox.add (mJTextField1);//All add is added to the parent container
Mbox.add (Box.createhorizontalstrut (50));//Set horizontal intervals
Mbox.add (New JLabel ("score"));
Mbox.add (MJTEXTFIELD2);
Mbox.add (Box.createhorizontalstrut (50));
Mbox.add (Mjbutton);
Mjframe.add (MBox);
Mjtextarea = new JTextArea (40,80);//Create a text area to display the output, so you must explicitly create
Mjtextarea.settext ("Write your data on top, click" \ n ");
Mjframe.add (Mjtextarea);
Mjframe.setvisible (TRUE);//Make the window explicit
Mjbutton.addactionlistener (this);



}

list<student> list = new arraylist<student> ();
@Override
public void actionperformed (ActionEvent e) {
TODO auto-generated Method Stub
/*
* Because only button has a click event, so you can directly without judgment, if there are multiple controls bound to the event will need to determine
* This directly determines whether the text box is empty
*/
Mjtextarea.settext ("");
String name = Mjtextfield1.gettext (). Trim ();
String grade = Mjtextfield2.gettext (). Trim ();
if (! "". Equals (name) &&! "". Equals (grade)) {
try {
List.add (New Student (name, float.parsefloat (grade)));
Mjtextarea.append ("Currently inserted information: Name:" +name+ "score:" +grade+ "\ n");
} catch (NumberFormatException E1) {
TODO auto-generated Catch block
E1.printstacktrace ();
Mjtextarea.append ("Do not know the result is the number format, re-enter!") \ n ");
}
}
Collections.sort (list);//Sort list
iterator<student> Iterator = List.iterator ();
Student Student;
while (Iterator.hasnext ()) {
Student = Iterator.next ();
Mjtextarea.append ("Name:" +student.name+ "Grade:" +student.grade+ "\ n");
}
}
}
Class Student implements comparable<student>{

String name;
float grade;

Public Student (String name, float grade) {
Super ();
THIS.name = name;
This.grade = grade;
}

@Override
public int compareTo (Student o) {
TODO auto-generated Method Stub



return (int) (o.grade*10-this.grade*10);//guarantee the accuracy of a decimal case comparison
}
}

public class Test1 {

public static void Main (string[] args) {
TODO auto-generated method stubs
Myjframe myjframe = new Myjframe ();//Display window
}

}

Java Collection Framework exercises: The user enters the student's name and score from two text boxes, respectively ....