Java.lang.Byte.parseByte() 方法 Java.lang.Byte.longValue() 方法 java.lang.Byte.parseByte(String s, int radix) Java.lang.Byte.parseByte() 方法 package com.codingdict; import java.lang.*; public class ByteDemo { public static void main(String[] args) { // create 2 byte primitives bt1, bt2 byte bt1, bt2; // create and assign values to String's s1, s2 String s1 = "+123"; String s2 = "-123"; /** * static method is called using class name. * assign parseByte result on s1, s2 to bt1, bt2 */ bt1 = Byte.parseByte(s1); bt2 = Byte.parseByte(s2); String str1 = "Parse byte value of " + s1 + " is " + bt1; String str2 = "Parse byte value of " + s2 + " is " + bt2; // print bt1, bt2 values System.out.println( str1 ); System.out.println( str2 ); } } Java.lang.Byte.longValue() 方法 java.lang.Byte.parseByte(String s, int radix)