Java read and write simple code for files

The program first writes a string to the specified file and then reads the contents of the file from another file to the screen.

The program code is as follows:

Import java.io.*;

public class ReadWrite {public

	void WriteFile () {
		String str = ' This was  a program ';//What to write
		try {
			F Ileoutputstream out = new FileOutputStream ("d:/program/readwriteshuchu.txt"); Output file path
			out.write (Str.getbytes ());
			Out.close ();
		} catch (Exception e) {
			e.printstacktrace ();
		}
	}

	public void ReadFile () {
		try {
			FileInputStream in = new FileInputStream ("d:/program/ceshi.txt");//Read file path
			byte bs[] = new byte[in.available ()];
			In.read (BS);
			System.out.println ("File content=\n" + new String (BS));
			In.close ();
		} catch (Exception e) {
			e.printstacktrace ();
		}
	}

	public static void Main (string[] args) {
		ReadWrite t = new ReadWrite ();
		T.readfile ();
		T.writefile ();
	}

After the program runs, T.writefile () outputs the contents of the Ceshi.txt under the program folder of D disk to the screen, T.writefile () creates a new file named ReadWriteshuchu.txt under the program folder in D, and will A program is written inside the file.