谁能帮我写一个有Java特色的java窗体（给15分）

Question

...JFrame   的默认显示风格就不和windows相同

Answer 1

class www
{
//定义域，一个二围的字符数组
  static String[][] dictionary={
  {"三人行必有我师","爱","中国","数字","圣诞快乐","你好","狗","猫","三","我","网页","网站","傻子","不行","头","肯德基","程序","数学","计算机","花"},
  {"three men must have my teacher","love","china","number","Merry Christmas","Hello","Dog","Cat","three","I","web","web site","foolishman","No way","head","KFC","programe","Mathematics","computer","flower"}
  };
  /************定义英译汉方法**********/
  public static String engtoCh(String s)
  {
  //逐个比较dictionary[1][i]中的字符串
  //然后找到则返回结果，否则返回空字符串
  for(int i=0;i<20;i++)
  {
  if(dictionary[1][i]==s)
  {return dictionary[0][i];}
  else 
  {return null;}
  }
}
public static void main(String args[])
{

System.out.println(engtoCh("love"));
}
}
//**********************************************************
//这个类为什么为什么有：missing return statment错误啊？？？？？？？
//**************