Java GeoJSON可以轉換為其他格式，如Shapefile、KML、GeoRSS等。以下是一種將GeoJSON轉換為Shapefile的方法：

1. 首先，您需要使用Java庫來讀取和處理GeoJSON數據。一個常用的庫是GeoTools，它提供了用于處理地理空間數據的各種工具和功能。您可以在Maven中添加以下依賴項來引入GeoTools庫：

<dependency>
    <groupId>org.geotools</groupId>
    <artifactId>gt-main</artifactId>
    <version>22.3</version>
</dependency>

2. 接下來，您需要編寫Java代碼來讀取GeoJSON文件并將其轉換為FeatureCollection對象。以下是一個示例代碼片段：

import org.geotools.feature.FeatureCollection;
import org.geotools.geojson.feature.FeatureJSON;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class GeoJSONToShapefileConverter {

    public static void main(String[] args) throws IOException {
        File geoJSONFile = new File("path/to/geojson/file.geojson");

        FileInputStream fis = new FileInputStream(geoJSONFile);
        FeatureJSON featureJSON = new FeatureJSON();
        FeatureCollection featureCollection = featureJSON.readFeatureCollection(fis);

        // Convert FeatureCollection to Shapefile
        // TODO: add code to convert FeatureCollection to Shapefile
    }
}

3. 最后，您需要編寫代碼來將FeatureCollection對象轉換為Shapefile。您可以使用GeoTools庫中的工具來實現這一點。以下是一個示例代碼片段：

import org.geotools.data.FileDataStore;
import org.geotools.data.FileDataStoreFinder;
import org.geotools.data.shapefile.ShapefileDataStore;
import org.geotools.feature.FeatureCollection;
import org.geotools.feature.FeatureIterator;
import org.geotools.geojson.feature.FeatureJSON;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class GeoJSONToShapefileConverter {

    public static void main(String[] args) throws IOException {
        File geoJSONFile = new File("path/to/geojson/file.geojson");

        FileInputStream fis = new FileInputStream(geoJSONFile);
        FeatureJSON featureJSON = new FeatureJSON();
        FeatureCollection featureCollection = featureJSON.readFeatureCollection(fis);

        File shapefile = new File("path/to/output/shapefile.shp");
        Map<String, Object> params = new HashMap<>();
        params.put(ShapefileDataStoreFactory.URLP.key, shapefile.toURI().toURL());
        ShapefileDataStore dataStore = (ShapefileDataStore) DataStoreFinder.getDataStore(params);

        SimpleFeatureType featureType = featureCollection.getSchema();
        dataStore.createSchema(featureType);

        FeatureIterator<SimpleFeature> iterator = featureCollection.features();
        while (iterator.hasNext()) {
            SimpleFeature feature = iterator.next();
            dataStore.addFeature(feature);
        }
        iterator.close();
    }
}

通過以上步驟，您可以將Java GeoJSON轉換為Shapefile格式。您可以根據需要進行調整和修改以適應不同的轉換需求。