如何使用 Java 覆盖字节数组中的特定块?
java 8object oriented programmingprogramming
Java 提供了一个 ByteBuffer 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,您可以使用position()方法替换缓冲区的内容:选择起始位置,并使用put()方法替换数据:
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

