基于Java中的特定约束打印字符串(字符串和数组)(压缩解压缩)

String str = "Hello World!";
for (int i = 0; i < str.length(); i++) {
    System.out.print(str.charAt(i));
}

String str = "Hello World!";
System.out.println("字符串长度：" + str.length());
System.out.println("第一个字符：" + str.charAt(0));

int[] nums = {3, 1, 2};
System.out.println("数组：" + Arrays.toString(nums));
Arrays.sort(nums);
System.out.println("排序后的数组：" + Arrays.toString(nums));

import java.io.*;
import java.util.zip.*;

public class CompressionExample {
    public static void compressFile(String sourceFile, String compressedFile) throws IOException {
        FileInputStream fis = new FileInputStream(sourceFile);
        FileOutputStream fos = new FileOutputStream(compressedFile);
        ZipOutputStream zipOut = new ZipOutputStream(fos);
        
        byte[] buffer = new byte[1024];
        int len;
        
        zipOut.putNextEntry(new ZipEntry(sourceFile));
        while ((len = fis.read(buffer)) > 0) {
            zipOut.write(buffer, 0, len);
        }
        
        zipOut.closeEntry();
        zipOut.close();
        fis.close();
        fos.close();
    }
    
    public static void decompressFile(String compressedFile, String decompressedFile) throws IOException {
        FileInputStream fis = new FileInputStream(compressedFile);
        ZipInputStream zipIn = new ZipInputStream(fis);
        FileOutputStream fos = new FileOutputStream(decompressedFile);
        
        ZipEntry entry = zipIn.getNextEntry();
        byte[] buffer = new byte[1024];
        int len;
        
        while ((len = zipIn.read(buffer)) > 0) {
            fos.write(buffer, 0, len);
        }
        
        zipIn.closeEntry();
        zipIn.close();
        fis.close();
        fos.close();
    }
    
    public static void main(String[] args) {
        String sourceFile = "example.txt";
        String compressedFile = "example.zip";
        String decompressedFile = "example_decompressed.txt";
        
        try {
            compressFile(sourceFile, compressedFile);
            decompressFile(compressedFile, decompressedFile);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}