java校验括号是否成对匹配

public class BracketsCheckTest {

	public static void main(String[] args) {
		System.out.println(bracketsCheck("a((()){khgg{[]sdfg}gdfg}"));
		System.out.println(bracketsCheck("}a((()){khgg{[]sdfg}gdfg}"));
		System.out.println(bracketsCheck("a}((()){khgg{[]sdfg}gdfg}"));
		System.out.println(bracketsCheck("a("));
	}
	
	/**
	 * 校验括号是否成对匹配
	 * 
	 * 返回-1为正常，其余数字代表错误位置，从零开始索引
	 * 
	 * @date 2018年11月22日 上午10:54:50
	 * @param checkedStr
	 * @return
	 */
	public static Integer bracketsCheck(String checkedStr) {
		Stack<Character> bracketsStack = new Stack<>();
		char[] chedkedCharArray = checkedStr.toCharArray();
		
		for (int i = 0; i < chedkedCharArray.length; i++) {
			char c = chedkedCharArray[i];
			
			// 左括号都压入栈顶，右括号进行比对
			if(c == '(' || c == '[' || c == '{') {
				bracketsStack.push(c);
			} else if(c == ')') {
				// 栈非空校验，防止首先出现的是右括号
				if(bracketsStack.isEmpty()) {
					return i;
				}
				Character popChar = bracketsStack.pop();
				if('(' != popChar) {
					return i;
				}
			} else if(c == ']') {
				if(bracketsStack.isEmpty()) {
					return i;
				}
				Character popChar = bracketsStack.pop();
				if('[' != popChar) {
					return i;
				}
			} else if(c == '}') {
				if(bracketsStack.isEmpty()) {
					return i;
				}
				Character popChar = bracketsStack.pop();
				if('{' != popChar) {
					return i;
				}
			}
		}
		
		// 结束后栈内为空则正常，否则返回字符串全长+1，表示有括号未结束
		if(bracketsStack.isEmpty()) {
			return -1;
		} else {
			return checkedStr.length() + 1;
		}
	}
}

执行结果
25
0
1
3