import
java.io.*; class Student implements Serializable{ String name; int note; Student(String name, int note){this.name = name;this.note = note;} public String toString(){ return name+" "+note; } } |
import
javax.swing.*; import java.awt.*; import java.awt.event.*; public class Apl extends JFrame{ JButton ad; JTextField tf[]= new JTextField[2]; List lst; JPanel contr, plst; AdSt adSt; Student prs[]=new Student[0]; Apl(int x, int y, int ln, int ht){ this.setLayout(new BorderLayout()); this.setBounds(x, y, ln, ht); this.setVisible(true); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); contr = new JPanel(new FlowLayout()); plst = new JPanel(new FlowLayout()); ad = new JButton("add"); contr.add(ad); tf[0]= new JTextField("name?",10); tf[1]= new JTextField("note?",3); contr.add(tf[0]); contr.add(tf[1]); ad.addActionListener(adSt=new AdSt()); add("North",contr); lst = new List(10); plst.add(lst); add("Center",plst); revalidate(); } class AdSt implements ActionListener{ public void actionPerformed(ActionEvent e ){ Student s; String n=tf[0].getText(); int nt=Integer.parseInt(tf[1].getText()); Student help[]= new Student[prs.length+1]; System.arraycopy(prs, 0, help, 0, prs.length); help[help.length-1]= s=new Student(n,nt); prs=help; tf[0].setText("name?");tf[1].setText("note?"); lst.add(""+s); revalidate(); } } public static void main(String [] arg){ Apl apl=new Apl(20,20,400,300); } } |
import
javax.swing.*; import java.awt.event.*; import java.io.*; public class Apl1 extends Apl{ JButton load,save; Apl1(){ super(20,20,600,250); load = new JButton("load"); load.addActionListener(new Load()); contr.add(load); save = new JButton("save"); save.addActionListener(new Save()); contr.add(save); revalidate(); } public static void main(String arg[]){ new Apl1(); } class Save implements ActionListener { public void actionPerformed(ActionEvent e ){ ObjectOutputStream oos = null; try{ oos = new ObjectOutputStream ( new FileOutputStream ("save.ser")); oos.writeObject(prs); } catch (IOException ex){ System.out.println(ex); } try{ if(oos!=null)oos.close(); } catch (IOException ex){} } } class Load implements ActionListener { public void actionPerformed(ActionEvent e ){ ObjectInputStream ios = null; try{ ios = new ObjectInputStream (new FileInputStream ("save.ser")); prs= (Student[])ios.readObject(); } catch (Exception ex){ tf[0].setText("Error"); } try{ if(ios!=null)ios.close(); } catch (IOException ex){} lst. removeAll(); for(int i=0;i<prs.length;i++){ lst.add(""+prs[i]); } } } } |
import
java.awt.event.*; public class Apl2 extends Apl1{ public static void main(String [] arg){ new Apl2(); } Apl2(){ tf[0].addMouseListener(new Sel0()); tf[1].addMouseListener(new Sel1()); } class Sel0 extends MouseAdapter{ public void mouseClicked(MouseEvent e){ tf[0].setText(""); } } class Sel1 extends MouseAdapter{ public void mouseClicked(MouseEvent e){ tf[1].setText(""); } } } |