如何在 Java 中覆盖字节数组中某个特定块?
Java 提供了一个 ByteBuffer 类,该类允许你使用其 wrap() 方法将数组包装到字节缓冲区中。执行此操作后,你可以使用 position(): 选择起始位置和 put(): 替换数据方法替换缓冲区的内容
示例
import java.nio.ByteBuffer; public class OverwriteChunkOfByteArray { public static void main(String args[]) { String str = "Hello how are you what are you doing"; byte[] byteArray = str.getBytes(); System.out.println("Contents of the byet array :: "); for(int i = 0; i<byteArray.length; i++) { System.out.println((char)byteArray[i]); } ByteBuffer buffer = ByteBuffer.wrap(byteArray); byte[] newArray = "where do you live ".getBytes(); buffer.position(18); buffer.put(newArray); System.out.println("Contents of the byte array after replacement::"); for(int i = 0; i<byteArray.length; i++) { System.out.println((char)byteArray[i]); } } }
输出
of the byte array :: H e l l o h o w a r e y o u w h a t a r e y o u d o i n g Contents of the byet array after replacement :: H e l l o h o w a r e y o u w h e r e d o y o u l i v e
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