Java条目验证
我正在使用socket开发服务器/客户端战舰游戏。项目的一部分需要在客户端进行输入验证,以便输入瓷砖位置。用户应该输入字母A-E和数字1-5,而现在,如果您输入的内容无效,它似乎会冻结。任何帮助都将不胜感激,提前感谢
do{
System.out.println("------------------------------------------------------------------------------------------------");
System.out.println("Please type in a board position in the format of a letter followed by number, such as 'A1'. ");
Scanner sc = new Scanner(System.in);
String BoardChoice = sc.next();
if(BoardChoice.equals("A1" ) || BoardChoice.equals("B1" ) || BoardChoice.equals("C1" ) || BoardChoice.equals("D1" ) || BoardChoice.equals("E1" ) ||
BoardChoice.equals("A2" ) || BoardChoice.equals("B2" ) || BoardChoice.equals("C2" ) || BoardChoice.equals("D2" ) || BoardChoice.equals("E2" ) ||
BoardChoice.equals("A3" ) || BoardChoice.equals("B3" ) || BoardChoice.equals("C3" ) || BoardChoice.equals("D3" ) || BoardChoice.equals("E3" ) ||
BoardChoice.equals("A4" ) || BoardChoice.equals("B4" ) || BoardChoice.equals("C4" ) || BoardChoice.equals("D4" ) || BoardChoice.equals("E4" ) ||
BoardChoice.equals("A5" ) || BoardChoice.equals("B5" ) || BoardChoice.equals("C5" ) || BoardChoice.equals("D5" ) || BoardChoice.equals("E5" ))
{
flagtoo = false;
writer.writeUTF(BoardChoice);
}
else
{
System.out.println("Invalid Input Please re-enter!");
}
}while(flagtoo);
# 1 楼答案
我建议您分别测试每个字符,用
charAt
将它们分开,并遵守变量命名约定。差不多# 2 楼答案
另一方面,我的建议是使用一种模式来实现正则表达式,该模式允许您匹配第一个字符alpha(无论大小写),后跟一个数字, 两者都在从→ e和1→ 五,