package sci;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.Label;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.*;

import javax.swing.*;

public class grade {

    public static void main(String[] args) {
       
        new Window();
    }
}
class Window extends JFrame implements ActionListener{
    Box bx_1,bx_2;
    JTextField jt1=new JTextField(10);
    JTextField jt2=new JTextField(10);
    JButton button=new JButton("提交");
    Container container=getContentPane();
    JTextArea jTextArea=new JTextArea();
    JPanel jPanel1=new JPanel();
    ArrayList<stu> list=new ArrayList<stu>();
    Window() {
        // TODO Auto-generated constructor stub、
        bx_1=Box.createHorizontalBox();
        bx_1.add(new Label("姓名："));
        bx_1.add(jt1);
        bx_1.add(Box.createHorizontalStrut(8));
        bx_1.add(new Label("分數"));
        bx_1.add(jt2);
        bx_1.add(button);

        jPanel1.add(bx_1);
        jPanel1.setLayout(new FlowLayout());
        container.add(jPanel1,BorderLayout.NORTH);

        JScrollPane jScrollPane=new JScrollPane(jTextArea);
        add(jScrollPane);
        container.add(jScrollPane, BorderLayout.CENTER);

        setTitle("視窗");
        setSize(500,400);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        button.addActionListener(this);

    }
    public void actionPerformed(ActionEvent e){

        String name=jt1.getText().toString();
        double grade=Double.parseDouble(jt2.getText());
        stu s=new stu();
        s.setName(name);
        s.setGrade(grade);
        list.add(s);
        Collections.sort(list, new SortByGrade());
        jTextArea.setText(null);
        for (stu stu : list) {
            jTextArea.append(stu.getName()+"  "+stu.getGrade()+"\n");

        }
    }   
}
class SortByGrade implements Comparator{

   
    public int compare(Object obj1, Object obj2) {
       
        stu s1=(stu)obj1;
        stu s2=(stu)obj2;
        return s1.getGrade()<=s2.getGrade()?1:-1;
    }
}
class stu{
    String name;
    double grade;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public double getGrade() {
        return grade;
    }
    public void setGrade(double grade) {
        this.grade = grade;
    }
}
 

 編寫一個應用程式，使用者分別從兩個文字框輸入學術的姓名和分數，程式按成績排序將這些學生的姓名和分數顯示在一個文字區中