如何使用Java覆盖字节数组中的特定块?
Java提供了ByteBuffer类,该类允许您使用其wrap() 方法将数组包装到字节缓冲区中。完成后,可以使用以下命令替换缓冲区的内容position()
:选择起始位置,和put()
:替换数据方法:
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]); } } }
输出结果
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