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Detailed explanation of conversion examples between Java byte streams and basic data types
Detailed explanation of conversion examples between Java byte streams and basic data types
This article mainly introduces examples of conversion between Java byte streams and basic data types. It has certain reference value. Interested friends can refer to it
In actual development, we often encounter the situation of communicating with embedded devices. Due to the poor processing capabilities of some embedded devices, data is often transmitted in the form of binary data streams. Here, these common Make a summary of the conversion.
Note: The default transmission mode is little endian
Convert the byte stream to int type data
public static int getInt(byte[] bytes) {
return (0xff & bytes[0]) | (0xff00 & (bytes[1] << 8)) | (0xff0000 & (bytes[2] << 16))
| (0xff000000 & (bytes[3] << 24));
}Convert the byte stream to long type data
public static long getLong(byte[] bytes) {
return ((0xffL & (long) bytes[0]) | (0xff00L & ((long) bytes[1] << 8)) | (0xff0000L & ((long) bytes[2] << 16))
| (0xff000000L & ((long) bytes[3] << 24)) | (0xff00000000L & ((long) bytes[4] << 32))
| (0xff0000000000L & ((long) bytes[5] << 40)) | (0xff000000000000L & ((long) bytes[6] << 48))
| (0xff00000000000000L & ((long) bytes[7] << 56)));
}Convert the byte stream to float type data
public static float getFloat(byte[] bytes){
int temp=getInt(bytes);
return Float.intBitsToFloat(temp);
}Convert the byte stream to double type data
public static double getDouble(byte[] bytes){
long temp=getLong(bytes);
return Double.longBitsToDouble(temp);
}Convert the int type data to Byte stream
public static byte[] getByteFromInt(int data){
byte[] temp=new byte[4];
temp[0]=(byte)(0xFF&(data));
temp[1]=(byte)(0xFF&(data>>8));
temp[2]=(byte)(0xFF&(data>>16));
temp[3]=(byte)(0xFF&(data>>24));
return temp;
}Convert long type data to byte stream
public static byte[] getByteFromLong(long data){
byte[] temp=new byte[8];
temp[0]=(byte)(0xFF&(data));
temp[1]=(byte)(0xFF&(data>>8));
temp[2]=(byte)(0xFF&(data>>16));
temp[3]=(byte)(0xFF&(data>>24));
temp[4]=(byte)(0xFF&(data>>32));
temp[5]=(byte)(0xFF&(data>>40));
temp[6]=(byte)(0xFF&(data>>48));
temp[7]=(byte)(0xFF&(data>>56));
return temp;
}Convert float type data to byte stream
public static byte[] getByteFromFloat(float data){
byte[] temp=new byte[4];
int tempInt=Float.floatToIntBits(data);
temp[0]=(byte)(0xFF&(tempInt));
temp[1]=(byte)(0xFF&(tempInt>>8));
temp[2]=(byte)(0xFF&(tempInt>>16));
temp[3]=(byte)(0xFF&(tempInt>>24));
return temp;
}Convert double type data to bytes Stream
public static byte[] getByteFromDouble(double data){
byte[] temp=new byte[8];
long tempLong=Double.doubleToLongBits(data);
temp[0]=(byte)(0xFF&(tempLong));
temp[1]=(byte)(0xFF&(tempLong>>8));
temp[2]=(byte)(0xFF&(tempLong>>16));
temp[3]=(byte)(0xFF&(tempLong>>24));
temp[4]=(byte)(0xFF&(tempLong>>32));
temp[5]=(byte)(0xFF&(tempLong>>40));
temp[6]=(byte)(0xFF&(tempLong>>48));
temp[7]=(byte)(0xFF&(tempLong>>56));
return temp;
}The above is the detailed content of Detailed explanation of conversion examples between Java byte streams and basic data types. For more information, please follow other related articles on the PHP Chinese website!
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