给定一个字符串str,求其中全部整数数字之和

参考 https://blog.csdn.net/duoduo18up/article/details/82193122

 public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String line = scan.nextLine();
        Stack stack=new Stack();
        int result=0;
        for(int i=0;i<line.length();i++){
            String temp=line.charAt(i)+"";
            if(temp.matches("-")){
                stack.push('-');
            }
            else if(temp.matches("\\d")){ //如果是数字
                int count=0;
                while(!stack.empty()){ //先弹出所有的符号
                    stack.pop();
                    count++;
                }
                stack.push(temp);
                for(int j=i+1;j<line.length();j++){
                    String other=line.charAt(j)+"";
                    if(other.matches("\\d")) {
                        stack.push(other);
                        i=j;
                    }
                    else break;

                }
                int jinwei=1;
                int result_temp=0;
                while(!stack.empty()){
                    int number=Integer.valueOf((String)stack.pop());
                    result_temp=result_temp+number*jinwei;
                    jinwei=jinwei*10;
                }

                if(count%2!=0) result_temp=-result_temp;
                result=result+result_temp;
            }

        }
        System.out.println(result);
    }