java生成大小写字母

Question

我得到类、接口或枚举错误以及表达式的非法启动。我怎样才能解决这个问题？该代码应该生成一个包含大写和小写字母的密码。它还需要检测输入的字母是大写还是小写

// Returns a random Capital letter as a char static private char GenerateCapitalLetter() { char returnChar = 'A'; // Write your code here // HINT: look at the GenerateNumber() method // HINT: think of how to modify GenerateNumber() to generate a Capital letter { Random random = new Random(); random.ints(65, 90).limit(10) { .forEach(a -> System.out.println(Character.toString((char) a))); } } } } // Generate lowercase letter static private char GenerateCapitalLetter() { char returnChar = 'a'; { Random random = new Random(); random.ints(97, 126).limit(10) { .forEach(a -> System.out.println(Character.toString((char) a))); } } } } // Tests to see if an input char is a Capital letter in code below // Tests to see if an input char is a lowercase letter char input=' '; { if (Character.isLowerCase(input) || Character.isUpperCase(input)) { if (Character.isLowerCase(input)) System.out.println("lower"); } else { System.out.println("upper"); } } }