Apprendre Code

1. OOP
Package
import
Imprt java.awt.*;
Class
Class nabil}
Public nabil)(
}
}
void AnyName)(
}
}
Public static void main)String args][(
}
}
}
Constructornabilnabil
nabil nnn=new nabil)(;
mainstaticstatic.

2. Java Structure Program:
Package Name;
Import Java Class;
Public classes NameClasss
}
//declaver of variables
int I;
char c;
Jlabel l1;
.
.
.
public void NameClass)(
}
System.out.println)""(;
}
Void show)(
}
System.out.println)"i="+i(;
}
public static void main)String][ args(
}
NameClass N=new NameClass)(;
N.i=10;
N.shwo)(;
}
}
constructer
Main
N
iClassName10
show()ClassName

3. ConstructorConstructorConstructor
class A}
int x=10;
int y=10;
public A)(
}
System.out.println)"x+y="+)x+y((;
}
public static void main)String][ args( }
new A)(;
}
}
x+y=20

4. class mohammed{
int x;
int y;
String h;
public mohammed()
{
System.out.println("class
name:mohammed");
}
void mo(int i)
{
System.out.println("x="+x);
System.out.println("y="+y);
System.out.println("s="+h);
System.out.println("i="+i);
}
public static void main(String[] args) {
mohammed m=new mohammed();
m.x=20;
m.y=30;
m.h="mohammed dawod";
m.mo(10);
}
}
class name:mohammed
x=20
y=30
s=mohammed dawod
i=10
Output

5. class mohammed{
public mohammed()
{
System.out.println("class
name:mohammed");
}
void mo(int i,int m)
{
System.out.println("i+m="+(i+m));
}}
class dawod{
public dawod(){
System.out.println("class name:dawod");
}
public void sum(int i,int j){
System.out.println("i+j="+(i+j));
}
public static void main(String[] args) {
mohammed m=new mohammed();
m.mo(10,20);
dawod d=new dawod();
d.sum(50,100);
}
}
class name:mohammed
i+m=30
class name:dawod
i+j=150
Output

6. class dawod{
public dawod(int x,String
s){
System.out.println(x+"
"+s);
}
public static void
main(String[] args) {
new dawod(10,"mohammed");
}
}
10mohammed
Output

7. Inheritance
OOP.
inheritance)
•classclass
•classSubClassclassSuperClass.
•extends
•final.
•classsubclassClasssuperClassprivatefinal
•ClasssuperClass
•inheritance
inheritance:

8. class A{
int x,y;
public void num()
{
System.out.println("x+y="+(x+y));
}
} class B extends A{
}
class run{
public static void main(String[] args)
{
A aa=new A();
B bb=new B();
bb.x=10;
bb.y=20;
bb.num();
} }
•BA

9. xyB.
B
AB
class A{
int x,y;
public void num()
{
System.out.println("x+y="+(x+y));
}
} class B extends A{
}
class run{
public static void main(String[] args)
{
A aa=new A();
B bb=new B();
bb.x=10;
bb.y=20;
bb.num();
} }
staticbody
objectA
num()
objectB
B
class B{
int x,y;
public void num()
}
System.out.println("x+y="+x+y);
{
x+y=30

10. class nabil{
int x=10;
int y=20;
void show()
{
System.out.println("x="+x+"n"+"y="+y);
}
}
class dawod extends nabil{
public dawod(){
++x;
--y;
}
public static void main(String[] args) {
dawod d=new dawod();
d.show();
}
}
x=11
y=19
Output

11. Polymorphism
1.Overloading
2.Overriding
3.Abstract
Overloading
sumsum(int xsum(char x
sum(int i, duoble x
sum(int x. (
sum(char x(
sum(int x,duoble x

12. Overloading
class overload}
void sum(int x)}
System.out.println("x:"+x);
}
void sum(char x)
}
System.out.println("x:"+x);
}
void sum(int i,double x)
}
System.out.println("i:"+i+"&"+"x:"+x);
}
public static void main(String[] args) }
overload oo=new overload();
oo.sum(10);
oo.sum('m');
oo.sum(10,10.5);
}}
x:10
x:m
i:10&x:10.5

13. Overriding:
Overriding
ABsum(int x,int yBsum(int x,int yBABAclass B extends A
BA
sum(int x,int yBBABoverriding.
overridingBAoverridingoverriding.
overriding

14. class A}
void sum(int x,int y)}
System.out.println("in class A: x+y="+(x+y));
}
}
class B extends A}
void sum(int x,int y)}
System.out.println("in class B: x+y="+(x+y));
}
public static void main(String[] args) }
B oo=new B();
oo.sum(10,20);
}
}
in class B: x+y=30
Boverriding(
overriding
Write java program that use overriding method in two classes one of them is A and the other is B
inhrites A ? (use two methods)

15. •
•
•
Design interface
(GUI(

16. swingawtbutton
Imoprt javax.swing.JButton;
labeltextfiledmenubar
Import javax.swing.*;
Buttonlabeltextfiled
•Jpanal
•JLabel
•JTextFiled
•JButton

17. import javax.swing.*;
class mohammed extends JPanel}
JLabel j1,j2;
JTextField t1,t2;
JButton b1;
public mohammed((}
setLayout(null(;
j1=new JLabel("Name"(;
j1.setBounds(10,20,40,25(;
add(j1(;
t1=new JTextField((;
t1.setBounds(60,20,200,25(;
add(t1(;
j2=new JLabel("ID"(;
j2.setBounds(20,50,40,25(;
add(j2(;
t2=new JTextField((;
t2.setBounds(60,50,25,25(;
add(t2(;
b1=new JButton("ok"(;
b1.setBounds(110,100,80,30(;
add(b1(;
}
public static void main(String[] avgs(
}
mohammed m=new mohammed((;
JFrame f=new JFrame("fffffff"(;
f.setVisible(true(;
f.setSize(300,250(;
f.setContentPane(m(;
f.setDefaultCloseOperation(f.EXIT_ON_CLOSE(;
}
}

18. import javax.swing.*;
class mohammed extends JPanel}
JLabel j1,j2;
JTextField t1,t2;
JButton b1;
JPanel
public mohammed((}
setLayout(null(;
j1=new JLabel("Name"(;
j1.setBounds(10,20,40,25(;
add(j1(;
t1=new JTextField((;
t1.setBounds(60,20,200,25(;
add(t1(;
j2=new JLabel("ID"(;
j2.setBounds(20,50,40,25(;
add(j2(;
t2=new JTextField((;
t2.setBounds(60,50,25,25(;
add(t2(;
b1=new JButton("ok"(;
b1.setBounds(110,100,80,30(;
add(b1(;
}
labelname
Name
labelpanel
j1.setBounds(10,20,40,25(;
(0,0(
(10,20(
40
25
labelpanel
ID
ok

19. ID
ok
name
public static void main(String[] avgs(
}
mohammed m=new mohammed((;
JFrame f=new JFrame("fffffff"(;
f.setVisible(true(;
f.setSize(300,250(;
f.setContentPane(m(;
f.setDefaultCloseOperation(f.EXIT_ON_CLOSE(;
}
}
mohammed
f.setSize(width,height(;

20. JMenuBar
JMenu
JMenuItem
copy toeditjmenufileJMenuItem
JMenuJMenuItem

21. import javax.swing.*;
class TestMenu extends JPanel}
JMenuBar mbr;
JMenu file,edit,Copy;
JMenuItem New,Open,Exit,c,d,e;
public TestMenu((}
setLayout(null(;
mbr=new JMenuBar((;
file=new JMenu("file"(;
edit=new JMenu("Edit"(;
Copy=new JMenu("Copy TO"(;
New=new JMenuItem("new"(;
Open=new JMenuItem("Open"(;
Exit=new JMenuItem("Exit"(;
c=new JMenuItem("C:/"(;
d=new JMenuItem("D:/"(;
e=new JMenuItem("E:/"(;
file.add(New(;
file.add(Open(;
file.add(Exit(;
Copy.add(c(;
Copy.add(d(;
Copy.add(e(;
edit.add(Copy(;
mbr.add(file(;
mbr.add(edit(;
add(mbr(;
mbr.setBounds(0,0,200,30(;
}
public static void main(String args[](
}
JFrame fr=new JFrame("mohammed"(;
TestMenu td=new TestMenu((;
fr.setContentPane(td(;
fr.setVisible(true(;
fr.setSize(200,200(;
fr.setDefaultCloseOperation(3(;
}
}

22. Panel
JTabbedPane
2JPanel
2JLabel

23. import java.awt.Container;
import javax.swing.*;
class Tab extends JFrame}
JLabel Lname,Lme;
JPanel jp1,jp2;
JTabbedPane tab;
Tab)(}
super)"Tap"(;
Container co=getContentPane)(;
Lname=new JLabel)"mohammed"(;
Lme=new JLabel)"yemen"(;
jp1=new JPanel)(;
jp2=new JPanel)(;
tab=new JTabbedPane)(;
jp1.add)Lname(;
jp2.add)Lme(;
tab.add)"Tab1",jp1(;
tab.add)"Tab2",jp2(;
co.add)tab(;
setSize)300,150(;
setVisible)true(;
}
public static void main)String[] args( }
Tab t=new Tab)(;
t.setDefaultCloseOperation)JFrame.EXIT_ON_CLOSE(;
}
}

24. import javax.swing.*;
class Tab extends JFrame}
JLabel Lname,Lme;
JPanel jp1,jp2;
JTabbedPane tab;
Tab)(}
super)"Tap"(;
Container co=getContentPane)(;
Lname=new JLabel)"mohammed"(;
Lme=new JLabel)"yemen"(;
jp1=new JPanel)(;
jp2=new JPanel)(;
tab=new JTabbedPane)(;
jp1.add)Lname(;
jp2.add)Lme(;
tab.add)"Tab1",jp1(;
tab.add)"Tab2",jp2(;
co.add)tab(;
setSize)300,150(;
setVisible)true(;
}
JFrame

25. public static void main)String[] args( }
Tab t=new Tab)(;
t.setDefaultCloseOperation)JFrame.EXIT_ON_CLOSE(;
{
{
Design interface )GUIGUIJCheckBoxJComboBox

26. OOP
OOP
•EVENT HANDLING
•STREEM
•
–