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MyEditor.java
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MyEditor.java
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import javax.swing.* ;
import java.awt.* ;
import java.awt.event.* ;
import java.io.* ;
import java.util.* ;
class MyEditor implements ActionListener{
JFrame jf ;
JLabel jl ;
JTextField jtf;
JTextArea jta,jta1 ;
JButton jbcompiler , jbrun ;
JScrollPane jsp , jsp1 ;
Runtime r ;
String str = "" ;
String fname="" ;
String result = "" ;
String result1 = "" ;
MyEditor(){
jf = new JFrame("My Editor") ;
jf.setLayout(null) ;
jl = new JLabel("Enter a java class name :") ;
jl.setBounds(35 , 20 , 230 , 25);
jtf = new JTextField();
jtf.setBounds(180,20,230,25) ;
jta = new JTextArea(50 , 50) ;
jta.addFocusListener(new MyFocusListener(this)) ;
jta1 = new JTextArea(50 , 50);
jta.setFont(new Font("varinda",Font.PLAIN,15) );
jsp = new JScrollPane(jta);
jsp1 = new JScrollPane(jta1);
jsp.setBounds(50 , 60 , 320 , 150 );
jsp1.setBounds(50 , 270 , 320 , 150 ) ;
jf.add(jsp) ;
jf.add(jsp1) ;
jbcompiler = new JButton("compile");
jbcompiler.addActionListener(this) ;
jbrun = new JButton("run");
jbrun.addActionListener(this) ;
jbcompiler.setBounds(100 , 230 , 80 , 25);
jbrun.setBounds(280 , 230 , 80 , 25);
jf.add(jl) ;
jf.add(jtf);
r = Runtime.getRuntime() ;
jf.add(jbcompiler);
jf.add(jbrun);
jbcompiler.addActionListener(this) ;
jbrun.addActionListener(this);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setSize(550 ,550);
jf.setVisible(true);
}
public void actionPerformed(ActionEvent e){
if(e.getSource() == jbcompiler)
{
str = "" ;
if(!jtf.getText().equals("") )
{
try{
fname = jtf.getText().trim() + ".java" ;
FileWriter fw = new FileWriter(fname) ;
String s1 = jta.getText() ;
PrintWriter pw = new PrintWriter(fw) ;
pw.println(s1);
pw.flush() ;
Process error = r.exec("C:\\Program Files\\Java\\jdk-9.0.1\\bin\\javac.exe " + fname ) ;
BufferedReader err = new BufferedReader(new InputStreamReader( error.getErrorStream() ));
while(true){
String temp= err.readLine();
if( temp != null ){
result += temp ;
result += "\n" ;
}
else{
break ;
}
}
if(result.equals("") ){
jta1.setText("Compilation Successful " + fname) ;
err.close() ;
}
else{
jta1.setText(result);
}
}
catch(Exception e1){
System.out.println(e1);
}
}
else{
jta1.setText("please enter java program name") ;
}
}
if(e.getSource() == jbrun){
int start = 0 ;
try{
String fn = jtf.getText().trim() ;
Process p = r.exec("C:\\Program Files\\Java\\jdk-9.0.1\\bin\\java.exe " + fn) ;
BufferedReader output = new BufferedReader(new InputStreamReader( p.getInputStream() ));
BufferedReader error = new BufferedReader(new InputStreamReader( p.getErrorStream() ));
while(true){
String temp = output.readLine();
if(temp != null){
result += temp ;
result += "\n" ;
}else{
break ;
}
}
while(true){
String temp = error.readLine() ;
if(temp != null){
result1 += temp ;
result1 += "\n" ;
}else{
break ;
}
}
output.close() ;
error.close() ;
jta1.setText(result + "\n" + result1) ;
}catch(Exception e2){
System.out.println(e2) ;
}
}
}
public static void main(String... args){
new MyEditor() ;
}
}
class MyFocusListener extends FocusAdapter{
MyEditor e ;
MyFocusListener(MyEditor e){
this.e = e ;
}
public void focusGained(FocusEvent fe){
String str = e.jtf.getText().trim() ;
e.jta.setText("public class " + str + "\n" + "{" + "\n" + "public static void main(String[] args)" + "\n" +
"{" + "\n" + " "+ "\n" + "}" + "\n" + "}" );
}
}