在命令行提示符下如何成功运行含有包命令的Java程序

一：源程序：

package javapTest;

public class JavapTip {

/**
     * @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
        String strWithStr = JavapTip.withStrings(5);
        String strWithStrBuf = JavapTip.withStringBuffer(5);

        System.out.println("strWithStr="+strWithStr);
        System.out.println("strWithStrBuf="+strWithStrBuf);
    }
private static String withStrings(int count) {
        String s = "";
for (int i = 0; i < count; i++) {
            s += i;
        }
return s;
    }
private static String withStringBuffer(int count) {
        StringBuffer sb = new StringBuffer();
for (int i = 0; i < count; i++) {
            sb.append(i);
        }
return sb.toString();
    } 

}