Java_compiler/MyEditor.java at master · Samyakb50/Java_compiler · GitHub

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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 jbcompile,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 java class name");
		jl.setBounds(20,20,130,25);
		jtf=new JTextField();
		jtf.setBounds(180,20,230,25);
		jta=new JTextArea(50,50);
		jta1=new JTextArea(50,50);
		jta.addFocusListener(new MyFocusListener(this));
		jta.setFont(new Font("arinda",Font.PLAIN,15));
		jta1.setFont(new Font("arinda",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);
		jbcompile=new JButton("compile");
		jbrun=new JButton("run");
		jbcompile.setBounds(100,230,80,25);
		jbrun.setBounds(280,230,80,25);
		jf.add(jl);
		jf.add(jtf);
		r=Runtime.getRuntime();
		jf.add(jbcompile);
		jf.add(jbrun);
		jbcompile.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()==jbcompile)
		{
			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\\jdk1.8.0_171\\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 successfull"+fname);
					err.close();
				}
				else
				{
					jta1.setText(result);
				}
		}
		catch(Exception e1)
		{
			System.out.println(e1);
		}
	}
	else
	{
		jta1.setText("please enter the java program name");
	}
	}
	else if(e.getSource()==jbrun)
	{
		int start=0;
		try
		{
			String fn=jtf.getText().trim();
			Process p=r.exec("C:\\Program Files\\Java\\jdk1.8.0_171\\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... s)
{
	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... s)"+"\n"+"{"+"\n"+"    "+"\n"+"}"+"\n"+"}");
	}
}