import java.util.Arrays; import java.util.function.BiFunction; import java.util.function.UnaryOperator; public class Task { public static void main(String[] args) { String[] words = args.clone(); if (words.length == 0) { words = new String[]{"a", "b", "c", "d", "e", "f", "g", "h", "i", "j"}; } // 把所有字母都转换成大写 handleList(words, new UnaryOperator<String>() { @Override public String apply(String s) { return null; } }); System.out.println(Arrays.toString(words)); // 把每个条目根据其索引位置进行重复 handleList2(words, new BiFunction<String, Integer, String>() { @Override public String apply(String s, Integer count) { return null; } }); System.out.println(Arrays.toString(words)); } public static void handleList(String[] list, UnaryOperator<String> operator) { for (int i = 0; i < list.length; i++) { list[i] = operator.apply(list[i]); } } public static void handleList2(String[] list, BiFunction<String, Integer, String> operator) { for (int i = 0; i < list.length; i++) { list[i] = operator.apply(list[i], i); } } }

这是一个 Java 代码，它定义了一个 Task 类，其中包含了两个方法 handleList 和 handleList2，分别对一个字符串数组进行操作。handleList 方法接受一个 UnaryOperator 参数，用于对数组中的每个元素进行操作；handleList2 方法接受一个 BiFunction 参数，用于对数组中的每个元素和其索引进行操作。在 main 方法中，先将命令行参数复制到 words 数组中，如果没有命令行参数，则使用默认的字符串数组。然后使用 handleList 方法将数组中的所有元素转换成大写字母，再使用 handleList2 方法将每个元素根据其索引位置进行重复。最后输出处理后的数组。

至于具体的代码实现，我需要更多的上下文信息才能回答。

相关问题

声明一个 Student 类，属性包括姓名、学号、总成绩；生成 10 个 Student 类对象,并放在一个一维数组中,编写方法按总成绩进行排序,将排序后的对象 分别保持在Vector 、ArrayList、 HashTable类型的对象中,并遍历显示其中 元素的信息。 程序设计参考框架如下： import java,util.Vector; import java.util.ArrayList; import java.util.Hashtable; import java.util.Enumeration; import java.util.Iterator; public class Ex71 { public static void main (String[] args){

public class Student implements Comparable<Student>{
private String name;
private int id;
private int totalScore;

public Student(String name, int id, int totalScore){
this.name = name;
this.id = id;
this.totalScore = totalScore;
}

public String getName(){
return name;
}

public int getId(){
return id;
}

public int getTotalScore(){
return totalScore;
}

public void setName(String name){
this.name = name;
}

public void setId(int id){
this.id = id;
}

public void setTotalScore(int totalScore){
this.totalScore = totalScore;
}

public int compareTo(Student s){
return this.totalScore - s.totalScore;
}
}

import java.util.Vector;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.Enumeration;
import java.util.Iterator;

public class Ex71 {
public static void main (String[] args){
Student[] students = new Student[10];
students[0] = new Student("Tom", 1001, 80);
students[1] = new Student("Jerry", 1002, 90);
students[2] = new Student("Alice", 1003, 85);
students[3] = new Student("Bob", 1004, 70);
students[4] = new Student("Peter", 1005, 95);
students[5] = new Student("Mary", 1006, 65);
students[6] = new Student("John", 1007, 75);
students[7] = new Student("Lucy", 1008, 88);
students[8] = new Student("David", 1009, 92);
students[9] = new Student("Lily", 1010, 78);

// sort by total score
Arrays.sort(students);

// put sorted objects into Vector
Vector<Student> vector = new Vector<Student>();
for(Student s : students){
vector.add(s);
}

// put sorted objects into ArrayList
ArrayList<Student> arrayList = new ArrayList<Student>();
for(Student s : students){
arrayList.add(s);
}

// put sorted objects into Hashtable
Hashtable<Integer, Student> hashtable = new Hashtable<Integer, Student>();
int i = 1;
for(Student s : students){
hashtable.put(i++, s);
}

// display elements in Vector
System.out.println("Elements in Vector:");
Enumeration<Student> enumeration = vector.elements();
while(enumeration.hasMoreElements()){
Student s = enumeration.nextElement();
System.out.println("Name: " + s.getName() + ", ID: " + s.getId() + ", Total Score: " + s.getTotalScore());
}

// display elements in ArrayList
System.out.println("Elements in ArrayList:");
Iterator<Student> iterator = arrayList.iterator();
while(iterator.hasNext()){
Student s = iterator.next();
System.out.println("Name: " + s.getName() + ", ID: " + s.getId() + ", Total Score: " + s.getTotalScore());
}

// display elements in Hashtable
System.out.println("Elements in Hashtable:");
Enumeration<Integer> keys = hashtable.keys();
while(keys.hasMoreElements()){
Integer key = keys.nextElement();
Student s = hashtable.get(key);
System.out.println("Name: " + s.getName() + ", ID: " + s.getId() + ", Total Score: " + s.getTotalScore());
}
}
}

import java.io.*; import java.util.Arrays; import java.util.Scanner; public class FileTest { public static void main(String[] args) throws IOException { // 接收给定的一行字符串 Scanner scanner = new Scanner(System.in); String line = scanner.nextLine();

// 创建文件对象，并检查文件是否存在 File file = new File(line); if (!file.exists()) { System.out.println("文件不存在！"); return; } // 读取文件内容 BufferedReader reader = new BufferedReader(new FileReader(file)); String content = ""; String temp; while ((temp = reader.readLine()) != null) { content += temp + "\n"; } // 关闭文件读取器 reader.close(); // 输出文件内容 System.out.println("文件内容：\n" + content); } }

这段代码是一个读取文件并输出文件内容的Java程序。首先，通过Scanner接收用户输入的文件路径，然后判断文件是否存在。如果文件不存在，则输出提示信息并结束程序。如果文件存在，则创建文件读取器并读取文件内容，将读取到的内容存储在一个字符串变量中。最后，关闭文件读取器并输出文件内容。