JAVA栈实例—括号匹配

import java.util.Stack;

public class test {
    public static void main(String[] args){
        System.out.print(isStringBalanced("asdasd)d"));
    }
    
    public static boolean isStringBalanced(String string){
         final char openrb = '(';   //定义常量
         final char closerb = ')';
         Stack<Character> s = new Stack<Character>();  //新建栈
         for (int i=0;i<string.length();i++){
            if (string.charAt(i) == openrb){
                s.push(openrb);                    //压入占顶
            }else if(string.charAt(i) == closerb){
                if (s.empty()){                    //是否为空
                    s.push(closerb); 
                }else if ((char)s.peek() == openrb){  //查看栈顶元素，但是不弹出
                    s.pop();                       //弹出栈顶元素
                }else{
                    s.push(closerb);
                }
            }
            
         }
         return s.empty();                 
    }
}