编写程序统计一个输入的Java源码中关键字（区分大小写）出现的次数未输入源码则认为输入非法， 当未输入源码时，程序输出Wrong Format 当没有统计数据时，输出为空 当有统计数据时，关键字按照升序排列，

以下是代码实现：

import java.util.*;

public class KeywordCounter {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入Java源码：");
        String sourceCode = scanner.nextLine().trim();
        if (sourceCode.isEmpty()) {
            System.out.println("Wrong Format");
            return;
        }
        String[] keywords = {
            "abstract", "assert", "boolean", "break", "byte", "case", "catch", "char", "class", "const", 
            "continue", "default", "do", "double", "else", "enum", "extends", "final", "finally", "float", 
            "for", "goto", "if", "implements", "import", "instanceof", "int", "interface", "long", "native", 
            "new", "package", "private", "protected", "public", "return", "short", "static", "strictfp", 
            "super", "switch", "synchronized", "this", "throw", "throws", "transient", "try", "void", 
            "volatile", "while"
        };
        Map<String, Integer> keywordCountMap = new TreeMap<>();
        String[] lines = sourceCode.split("\n");
        for (String line : lines) {
            line = line.trim();
            if (!line.isEmpty() && !line.startsWith("//") && !line.startsWith("/*")) {
                String[] words = line.split("[\\s\\p{Punct}&&[^$_]]+");
                for (String word : words) {
                    if (Arrays.asList(keywords).contains(word)) {
                        keywordCountMap.put(word, keywordCountMap.getOrDefault(word, 0) + 1);
                    }
                }
            }
        }
        if (keywordCountMap.isEmpty()) {
            System.out.println("没有统计数据");
        } else {
            System.out.println("关键字\t数量");
            for (String keyword : keywordCountMap.keySet()) {
                System.out.println(keywordCountMap.get(keyword) + "\t" + keyword);
            }
        }
    }

}

这个程序使用了一个字符串数组 `keywords` 来存储 Java 中的关键字，使用了一个 Map `keywordCountMap` 来存储每个关键字出现的次数。程序将输入的源码按行分割，对每一行进行分词，统计出现的关键字的数量。最后按照关键字升序输出统计结果。