Painting Editor/ Drawing Pad in JAVA
/**
* MakeCodeEasy
*/
import java.awt.*;
import java.awt.event.*;
public class Painting implements MouseMotionListener,MouseListener
{
Frame f;
int x,y;
int px;
int py;
int count=0;
public Painting()
{
f=new Frame();
f.setSize(400,400);
f.setVisible(true);
f.addMouseMotionListener(this);
f.addMouseListener(this);
WindowCloser wc=new WindowCloser();
f.addWindowListener(wc);
}
public void mouseDragged(MouseEvent e1)
{
}
public void mouseMoved(MouseEvent e2)
{
if(count==0)
{
x=e2.getX();
y=e2.getY();
Graphics g=f.getGraphics();
g.setColor(Color.blue);
g.drawLine(x,y,x,y);
px=x;
py=y;
count=1;
}
else
{
x=e2.getX();
y=e2.getY();
Graphics g=f.getGraphics();
g.setColor(Color.blue);
g.drawLine(px,py,x,y);
px=x;
py=y;
}
}
public void mouseClicked(MouseEvent e3)
{
}
public void mouseEntered(MouseEvent e4)
{
}
public void mouseExited(MouseEvent e5)
{
count=0;
}
public void mousePressed(MouseEvent e6)
{
count=0;
}
public void mouseReleased(MouseEvent e7)
{
}
public static void main(String args[])
{
Painting pnt=new Painting();
}
}
Output :-
Basic Calculator in JAVA
/**
* Basic Calculator
* @author : Makecodeeasy
*/
import java.awt.*;
import java.awt.event.*;
public class Calc implements ActionListener
{
TextField tf;
public Calc()
{
//FlowLayout fl=new FlowLayout(FlowLayout.LEFT,0,0);
Font fnt=new Font("Arial",Font.BOLD,20);
GridLayout gl1=new GridLayout(5,0);
Frame f=new Frame();
f.setLayout(gl1);
f.setSize(250,250);
WindowCloser wc=new WindowCloser();
f.addWindowListener(wc);
ScrollPane sp=new ScrollPane(ScrollPane.SCROLLBARS_NEVER);
tf=new TextField();
tf.setFont(fnt);
//tf.setBackground(Color.yellow);
sp.add(tf);
f.add(sp);
GridLayout gl2=new GridLayout(0,4);
Panel p1=new Panel();
p1.setLayout(gl2);
Button b1=new Button("1"); b1.addActionListener(this);
Button b2=new Button("2"); b2.addActionListener(this);
Button b3=new Button("3"); b3.addActionListener(this);
Button b4=new Button("+"); b4.addActionListener(this);
b1.setFont(fnt);
b2.setFont(fnt);
b3.setFont(fnt);
b4.setFont(fnt);
p1.add(b1);
p1.add(b2);
p1.add(b3);
p1.add(b4);
f.add(p1);
Panel p2=new Panel();
p2.setLayout(gl2);
Button b5=new Button("4"); b5.addActionListener(this);
Button b6=new Button("5"); b6.addActionListener(this);
Button b7=new Button("6"); b7.addActionListener(this);
Button b8=new Button("-"); b8.addActionListener(this);
b5.setFont(fnt);
b6.setFont(fnt);
b7.setFont(fnt);
b8.setFont(fnt);
p2.add(b5);
p2.add(b6);
p2.add(b7);
p2.add(b8);
f.add(p2);
Panel p3=new Panel();
p3.setLayout(gl2);
Button b9=new Button("7"); b9.addActionListener(this);
Button b10=new Button("8"); b10.addActionListener(this);
Button b11=new Button("9"); b11.addActionListener(this);
Button b12=new Button("*"); b12.addActionListener(this);
b9.setFont(fnt);
b10.setFont(fnt);
b11.setFont(fnt);
b12.setFont(fnt);
p3.add(b9);
p3.add(b10);
p3.add(b11);
p3.add(b12);
f.add(p3);
Panel p4=new Panel();
p4.setLayout(gl2);
Button b13=new Button("C"); b13.addActionListener(this);
Button b14=new Button("0"); b14.addActionListener(this);
Button b15=new Button("/"); b15.addActionListener(this);
Button b16=new Button("="); b16.addActionListener(this);
b13.setFont(fnt);
b14.setFont(fnt);
b15.setFont(fnt);
b16.setFont(fnt);
p4.add(b13);
p4.add(b14);
p4.add(b15);
p4.add(b16);
f.add(p4);
f.setVisible(true);
}
public static int count=0;
int temp;
int temp1,sum,sub,div,mul;
String op,result;
public void actionPerformed(ActionEvent e)
{
String str=e.getActionCommand();
if(str.equals("1"))
{
tf.setText("1");
if(count==0)
{
temp=Integer.parseInt(str);
count=1;
}
else
{
temp1=Integer.parseInt(str);
count=0;
}
}
else if(str.equals("2"))
{
tf.setText("2");
if(count==0)
{
temp=Integer.parseInt(str);
count=1;
}
else
{
temp1=Integer.parseInt(str);
count=0;
}
}
else if(str.equals("3"))
{
tf.setText("3");
if(count==0)
{
temp=Integer.parseInt(str);
count=1;
}
else
{
temp1=Integer.parseInt(str);
count=0;
}
}
else if(str.equals("4"))
{
tf.setText("4");
if(count==0)
{
temp=Integer.parseInt(str);
count=1;
}
else
{
temp1=Integer.parseInt(str);
count=0;
}
}
else if(str.equals("5"))
{
tf.setText("5");
if(count==0)
{
temp=Integer.parseInt(str);
count=1;
}
else
{
temp1=Integer.parseInt(str);
count=0;
}
}
else if(str.equals("6"))
{
tf.setText("6");
if(count==0)
{
temp=Integer.parseInt(str);
count=1;
}
else
{
temp1=Integer.parseInt(str);
count=0;
}
}
else if(str.equals("7"))
{
tf.setText("7");
if(count==0)
{
temp=Integer.parseInt(str);
count=1;
}
else
{
temp1=Integer.parseInt(str);
count=0;
}
}
else if(str.equals("8"))
{
tf.setText("8");
if(count==0)
{
temp=Integer.parseInt(str);
count=1;
}
else
{
temp1=Integer.parseInt(str);
count=0;
}
}
else if(str.equals("9"))
{
tf.setText("9");
if(count==0)
{
temp=Integer.parseInt(str);
count=1;
}
else
{
temp1=Integer.parseInt(str);
count=0;
}
}
else if(str.equals("0"))
{
tf.setText("0");
if(count==0)
{
temp=Integer.parseInt(str);
count=1;
}
else
{
temp1=Integer.parseInt(str);
count=0;
}
}
else if(str.equals("+"))
{
tf.setText("+");
op=str;
}
else if(str.equals("-"))
{
tf.setText("-");
op=str;
}
else if(str.equals("/"))
{
tf.setText("/");
op=str;
}
else if(str.equals("*"))
{
tf.setText("*");
op=str;
}
else if(str.equals("="))
{
if(op.equals("+"))
{
sum=temp+temp1;
result=sum+"";
tf.setText(result);
temp=sum;
count=1;
}
else if(op.equals("-"))
{
sub=temp-temp1;
result=sub+"";
tf.setText(result);
temp=sub;
count=1;
}
else if(op.equals("*"))
{
mul=temp*temp1;
result=mul+"";
tf.setText(result);
temp=mul;
count=1;
}
else if(op.equals("/"))
{
try
{
div=temp/temp1;
result=div+"";
tf.setText(result);
temp=div;
count=1;
}
catch(Exception e1)
{
tf.setText("Can't divide by Zero");
}
}
}
else if(str.equals("C"))
{
tf.setText("0");
count=1;
}
}
public static void main(String args[])
{
Calc cal=new Calc();
}
}
Output :-
Working of close button of Awt window
/*
* MakeCodeEasy :- Rahul Jain
*/
import java.awt.*;
import java.awt.event.*;
public class WindowCloser extends WindowAdapter
{
public void windowClosing(WindowEvent e)
{
Window w=e.getWindow();
w.setVisible(false);
w.dispose(); //release the memory
System.exit(1);
}
}
Simple Editor by JAVA AWT
/**
* MakeCodeEasy :- Rahul Jain
*/
import java.awt.*;
import java.awt.event.*;
import java.io.*;
public class Editor implements ActionListener
{
Frame f;
MenuBar mb;
Menu m1,m2,m3;
Label l1,l2;
TextField t1,t2;
Button b1,b2,b3,b4;
MenuItem nw,op,sv,svs,ext,fnd,fndr;
TextArea ta;
FileDialog fd;
String name,path,n;
int count=0;
Frame f2;
boolean flag;
public Editor()
{
f=new Frame("Editor");
f.setSize(500,500);
WindowCloser wc=new WindowCloser();
f.addWindowListener(wc);
mb=new MenuBar();
m1=new Menu("File");
m2=new Menu("Tools");
ta=new TextArea();
f.add(ta);
nw=new MenuItem("New");
op=new MenuItem("Open");
sv=new MenuItem("Save");
svs=new MenuItem("Save As");
ext=new MenuItem("Exit");
fnd=new MenuItem("Find");
fndr=new MenuItem("Find & Replace");
fd=new FileDialog(f,"Save As",FileDialog.SAVE);
nw.addActionListener(this);
op.addActionListener(this);
sv.addActionListener(this);
svs.addActionListener(this);
ext.addActionListener(this);
fnd.addActionListener(this);
fndr.addActionListener(this);
m1.add(nw);
m1.add(op);
m1.add(sv);
m1.add(svs);
m1.addSeparator();
m1.add(ext);
m2.add(fnd);
m2.add(fndr);
GridLayout gl=new GridLayout(3,0);
f2=new Frame("Find");
f2.setSize(300,200);
f2.setLayout(gl);
Label l1=new Label("Find");
TextField tf=new TextField(10);
Panel p=new Panel();
Button b1=new Button("Find Next");
Button b2=new Button("Close");
b2.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae1)
{
f2.setVisible(false);
f2.dispose();
}
});
p.add(b1);
p.add(b2);
f2.add(l1);
f2.add(tf);
f2.add(p);
mb.add(m1);
mb.add(m2);
f.setMenuBar(mb);
f.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
try
{
//String str=e.getActionCommand();
MenuItem mi=(MenuItem)e.getSource();
if(mi==nw)
{
ta.setText("");
sv.setEnabled(true);
}
else if(mi==op)
{
fd=new FileDialog(f,"Open",FileDialog.LOAD);
fd.setVisible(true);
name=fd.getFile();
path=fd.getDirectory();
n=path+name+"";
File fl=new File(path,name);
FileInputStream fis=new FileInputStream(fl);
int ch;
ta.setText("");
while((ch=fis.read())!=-1)
{
ta.appendText((char)ch+"");
}
sv.setEnabled(true);
fis.close();
f.setTitle(fd.getFile()+"-Notepad");
}
else if(mi==sv)
{
fd=new FileDialog(f,"Save",FileDialog.SAVE);
if(flag==false)
{
fd.setVisible(true);
name=fd.getFile();
path=fd.getDirectory();
String strr=ta.getText();
File f=new File(path,name);
//f.createNewFile();
String str1=ta.getText();
FileOutputStream fos=new FileOutputStream(f);
char arr[];
arr=strr.toCharArray();
for(int i=0;i<arr.length;i++)
{
fos.write(arr[i]);
}
fos.close();
}
else
{
System.out.println(n);
/* name=fd.getFile();
path=fd.getDirectory();
File f=new File(path,name);*/
String strr1=ta.getText();
File f=new File(n);
FileOutputStream fos=new FileOutputStream(f);
char arr[];
arr=strr1.toCharArray();
for(int i=0;i<arr.length;i++)
{
fos.write(arr[i]);
}
fos.close();
}
}
else if(mi==svs)
{
fd=new FileDialog(f,"Save As",FileDialog.SAVE);
fd.setVisible(true);
name=fd.getFile();
path=fd.getDirectory();
File f=new File(path,name);
String str1=ta.getText();
FileOutputStream fos=new FileOutputStream(f);
char arr[];
arr=str1.toCharArray();
for(int i=0;i<arr.length;i++)
{
fos.write(arr[i]);
}
fos.close();
}
else if(mi==ext)
{
f.setVisible(false);
f.dispose(); //release the memory
System.exit(1);
}
else if(mi==fnd)
{
f2.setVisible(true);
}
else if(mi==fndr)
{
}
}
catch(Exception ex)
{
}
}
public void textValueChanged(TextEvent te)
{
sv.setEnabled(true);
flag=true;
}
public static void main(String args[])
{
Editor ed=new Editor();
}
}
Compile the Program :- javac Editor.java
Run the Program:- java Editor
Output:-
Note :- In Current program close button will not work.
For working of close button see our next post
Window closing in Java Awt
