parenthesis.java

Java程序设计技巧与开发实例附书源代码。

public class Parenthesis
{
    private char parens;
    public Parenthesis(char _parens)
    {
        parens = _parens;
    }

    public static boolean isOpening(char parens)
    {
        return ( (parens == '(') || (parens == '[') || (parens == '{'));
    }

    public static boolean isClosing(char parens)
    {
        return ( (parens == ')') || (parens == ']') || (parens == '}'));
    }

    public boolean matches(char otherParens)
    {
        if ( (parens == '(') && (otherParens == ')'))
        {
            return true;
        }
        else if ( (parens == '{') && (otherParens == '}'))
        {
            return true;
        }
        else if ( (parens == '[') && (otherParens == ']'))
        {
            return true;
        }
        else
        {
            return false;
        }
    }
}