小弟我有两个java程序，小弟我想一个调用另外一个java的结果如何弄

我有两个java程序，我想一个调用另外一个java的结果怎么弄

Java code

import java.io.*;import jxl.*;public class ReadXLS {public static void main(String args[]){    try{        Workbook book=Workbook.getWorkbook(new File("产品分类.map.xls"));        Sheet sheet=book.getSheet(0);        for(int i=1;i<sheet.getRows();i++){            Cell c=sheet.getCell(5,i);            System.out.println(sheet.getCell(5,i).getContents());        }        book.close();    }catch(Exception e){                System.out.println(e);    }}        }

Java code

import java.io.*;import java.net.HttpURLConnection;import java.net.*;import jxl.Cell;import jxl.Sheet;import jxl.Workbook;public class URLUtil {    public static String getHtml(String urlString){        try{            StringBuffer html= new StringBuffer();            URL url=new URL(urlString);            HttpURLConnection conn=(HttpURLConnection)url.openConnection();            InputStreamReader isr=new InputStreamReader(conn.getInputStream());            BufferedReader br = new BufferedReader(isr);            String temp;                        while((temp = br.readLine())!=null){                html.append(temp).append("\n");            }            br.close();            isr.close();            return html.toString();        }catch (Exception e){            e.printStackTrace();            return null;        }            }            public static void main(String[] args){        System.out.println(URLUtil.getHtml("http://www.baidu.com"));    }}

Java code

import java.io.*;import jxl.*;public class ReadXLS {public void call(){    try{        Workbook book=Workbook.getWorkbook(new File("产品分类.map.xls"));        Sheet sheet=book.getSheet(0);        for(int i=1;i<sheet.getRows();i++){            Cell c=sheet.getCell(5,i);            System.out.println(sheet.getCell(5,i).getContents());        }        book.close();    }catch(Exception e){                System.out.println(e);    }}        }