concept byte in category java

This is an excerpt from Manning's book Java SE 11 Programmer I Certification Guide MEAP V03. Login to get full access to this book.

Figure 1.2 Java’s magic – Java Virtual Machine and byte code

byte

public final class String
    implements java.io.Serializable, Comparable<String>, CharSequence,
               Constable, ConstantDesc {
    /**
     * The value is used for character storage.
     */
    private final byte[] value;     
   
    @Native static final byte LATIN1 = 0;
    @Native static final byte UTF16  = 1;
 
    /**
     * The identifier of the encoding used to encode the bytes in
     * {@code value}. The supported values in this implementation are
     *
     * LATIN1
     * UTF16
    private final byte coder;    
                                 #A
}

This is an excerpt from Manning's book OCA Java SE 8 Programmer I Certification Guide. Login to get full access to this book.

Purpose: Note the type of the variable that’s passed as an argument to the switch construct. Among the primitive data types, you can pass on variables of types byte, short, char, and int to a switch construct. Other data types that you can pass to a switch construct are Byte, Short, Integer, Character, enum, and String.

byte

public void addNumbers(byte arg1, int arg2, int arg3) {
    double sum = arg1 + arg2 + arg3;
}