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();
     }
 }