如下的代码如何输入//Test public method public HashMap(int initialCapacity) { this(initialCapacity, DEFAULT_LOAD_FACTOR); } public HashMap(int initialCapacity, float loadFactor) { if (initialCapacity < 0) throw new IllegalArgumentException("Illegal initial capacity: " + initialCapacity); if (initialCapacity > MAXIMUM_CAPACITY) initialCapacity = MAXIMUM_CAPACITY; if (loadFactor <= 0 || Float.isNaN(loadFactor)) throw new IllegalArgumentException("Illegal load factor: " + loadFactor); this.loadFactor = loadFactor; this.threshold = tableSizeFor(initialCapacity); } exit

你可以使用以下Java代码来读入这段源码：

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // 读入源码
        System.out.println("请输入源码：");
        String sourceCode = "";
        String line;
        while (!(line = scanner.nextLine()).equals("exit")) {
            sourceCode += line + "\n";
        }

        // 统计关键字数量
        String[] keywords = {"abstract", "assert", "boolean", "break", "byte", "case", "catch", "char", "class", "const",
            "continue", "default", "do", "double", "else", "enum", "extends", "false", "final", "finally", "float",
            "for", "goto", "if", "implements", "import", "instanceof", "int", "interface", "long", "native", "new",
            "null", "package", "private", "protected", "public", "return", "short", "static", "strictfp", "super",
            "switch", "synchronized", "this", "throw", "throws", "transient", "true", "try", "void", "volatile", "while"};

        int count = 0;
        for (String word : sourceCode.split("\\W+")) {
            if (word.isEmpty()) {
                continue;
            }
            for (String keyword : keywords) {
                if (word.equals(keyword)) {
                    count++;
                    break;
                }
            }
        }

        // 输出关键字数量
        System.out.println("源码中关键字的数量为：" + count);
    }
}

该程序会读入从键盘输入的源码，输入完毕后输入“exit”即可停止输入。程序会统计源码中Java关键字的数量，并输出这个数量。请注意，该程序只是一个简单的演示，实际应用中可能需要更为复杂的处理方式。