var un_gzip = function(appdata) { //base64 decode var strData = atob(decodeURIComponent(appdata)); // Convert binary string to character-number array var charData = strData.split('').map(function(x) { return x.charCodeAt(0); }); // Turn number array into byte-array var binData = new Uint8Array(charData); // pako ungzip/inflate var data = pako.ungzip(binData, { to: 'string' }); return app_json_format(data); }上面代码如何转化为Java代码

以下是将给定JavaScript代码转换为Java代码的方法：

import java.util.Base64;
import java.util.zip.DataFormatException;
import java.util.zip.Inflater;

public class Main {
    public static void main(String[] args) throws DataFormatException {
        String appdata = "appdata"; // 请将此处替换为实际的appdata
        String strData = new String(Base64.getDecoder().decode(appdata));
        byte[] charData = strData.getBytes();
        Inflater inflater = new Inflater();
        inflater.setInput(charData);
        byte[] buffer = new byte[1024];
        StringBuilder output = new StringBuilder();
        while (!inflater.finished()) {
            int count = inflater.inflate(buffer);
            output.append(new String(buffer, 0, count));
        }
        inflater.end();
        System.out.println(app_json_format(output.toString()));
    }

    private static String app_json_format(String data) {
        // 请将此处替换为实际的app_json_format代码
        return null;
    }
}

请注意，由于Java没有内置的pako库，因此我们必须手动使用Java的内置压缩库来解压缩数据。