Stack判断括号匹配

public class MatchReg {

	private static Stack<Character> stack = new Stack<Character>();
	/**
	 * 简介：判断"{}"是否匹配
	 * 思路：遇"{"入栈, 遇"}"出栈
	 * @param reg
	 * @return
	 */
	private static  boolean isMatch(String reg){
		char cAarry[] = reg.toCharArray();
		for(char c: cAarry){
			if(c == '{'){
				stack.push(c);
			}
			else if(c == '}'){
				stack.pop();
			}
			if(stack.isEmpty()){
				return true;
			}
		}
		return false;
	}