Writing primitive data-types can be easily done, using the DataOutputStream class. DataOutputStream provides simple methods to write primitive data-types out to any output stream, whether it be the user console, a network connection, or a file.

Data Type


boolean writeBoolean(boolean v);
byte writeByte(int v);
writeBytes(String s);
char, string writeChar(int v);
writeChars(String s);
double writeDouble(double v);
float writeFloat(float v);
int writeInt(int v);
long writeLong(long v);
short writeShort(int v);
string writeUTF(String str);

Java also provides a corresponding DataInputStream, which will allow you to read data back. This means you can write a data structure out to a disk or network connection, and read it back at a later date.

Posted in: Java

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