basicinput.java

java实现的税务计算器程序。中英文操作界面

//******************* start of BasicInput.java
package basicIO;
import java.io.*;
import java.util.StringTokenizer;

public class BasicInput {
   public BasicInput() throws IOException {
//	  st.returnDelims=false;
      init( new InputStreamReader( System.in ) );
   }
   public BasicInput( String f ) throws IOException {
      init( new InputStreamReader( new FileInputStream( f ) ) );
      diskFile = true;
   }
   public void close() throws IOException {
      if ( diskFile && input != null )
        input.close();
   }
   public boolean eof() throws IOException {
      resetBuffer();
      return !st.hasMoreTokens();
   }
   public String getRecord() throws IOException {
      resetBuffer();
      st = null;     // forces a read on next resetBuffer()
      return buffer;
   }
   public String getString() throws IOException {
      resetBuffer();
      return st.nextToken();
   }
   public byte getByte() throws IOException {
      resetBuffer();
      return Byte.parseByte( st.nextToken() );
   }
   public int getInt() throws IOException {
      resetBuffer();
      return Integer.parseInt( st.nextToken() );
   }
   public double getDouble() throws IOException {
      resetBuffer();
      return Double.parseDouble( st.nextToken() );
   }
   public char getChar() throws IOException {
      resetBuffer();
      return st.nextToken().charAt( 0 ); //*** 1st char in String
   }
   private void init( InputStreamReader in ) throws IOException {
      close();
      input = new BufferedReader( in );
      st = null;
      resetBuffer();
   }
   private void resetBuffer() throws IOException {
      if ( st == null || !st.hasMoreTokens() ) {
        buffer = input.readLine();
        if ( buffer != null )
          st = new StringTokenizer( buffer );
      }
   }
   protected BufferedReader input;
   private String buffer;
   private StringTokenizer st;
   private boolean diskFile;
}
//******************* end of BasicInput.java