在《Java虚拟机规范》给出了单个boolean占4个字节,和boolean数组1个字节的定义,具体 还要看虚拟机实现是否按照规范来,所以1个字节、4个字节都是有可能的[3] References [1] 官方文档的描述: http://docs.oracle.com/javase/tutori...
stackoverflow就有关于boolean占几个字节的讨论。 what-is-the-size-of-a-boolean-variable-in-java 其中有一个高赞回答: class LotsOfBooleans{ boolean a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, aa, ab, ac, ad, ae, af; boolean b0, b1, b2, b3, b4, b5, b6, b7, b8, b9, ba, ...
在google中能查到一篇文章(原文地址:https://stackoverflow.com/questions/383551/what-is-the-size-of-a-boolean-variable-in-java)。里面有个高手,通过实操测试了在Sun's JDK build 1.6.0_11环境下,boolean类型到底占几个字节,实操源码如下。 class LotsOfBooleans { boolean a0, a1, a2, a3, a4, a5, ...
从以上内容我们可以得知JAVA规范中没有定义boolean类型的大小。 这在stackoverflow中的这个问题有所提及 What is the size of a boolean variable in Java? 这里讲到 It'svirtualmachine dependent.// 由虚拟机自己实现 而我在其他地方查到了如下资料: 根据:(JVM规范第2版 3.3.4节) Instead, expressionsinthe Ja...
variableName: The name of the variable. value: The value to assign to the variable, which must be either true or false. Examples Example 1: Basic Usage public class BooleanExample { public static void main(String[] args) { boolean isJavaFun = true; boolean isFishTasty = false; System....
在google中能查到一篇文章(原文地址:https://stackoverflow.com/questions/383551/what-is-the-size-of-a-boolean-variable-in-java)。里面有个高手,通过实操测试了在Sun's JDK build 1.6.0_11环境下,boolean类型到底占几个字节,实操源码如下。 classLotsOfBooleans{booleana0,a1,a2,a3,a4,a5,a6,a7,a8,a9...
一、oracle本身没有boolean类型,就是说跟数据库相关的类型中不包括boolean,一般采用number(1)和char(1)来实现。 所以”You cannot insert the values TRUE and FALSE into a database column. Also, you cannot select or fetch column values into a BOOLEAN variable.“ ...
Exercise: JAVA Boolean TypesWhat is the correct syntax for declaring a boolean variable in Java?boolean isJavaFun = 'true'; boolean isJavaFun = true; bool isJavaFun = true; bool isJavaFun = 1;Submit Answer » What is an Exercise? Test what you learned in the chapter: JAVA Boolean...
variableName: The name of the variable. The value can be either true or false. Examples Example 1: Boolean in Conditional Statement public class BooleanExample { public static void main(String[] args) { boolean isJavaFun = true; if (isJavaFun) { System.out.println("Java is fun!"); }...
在google中能查到一篇文章(原文地址:https://stackoverflow.com/questions/383551/what-is-the-size-of-a-boolean-variable-in-java)。里面有个高手,通过实操测试了在Sun's JDK build 1.6.0_11环境下,boolean类型到底占几个字节,实操源码如下。 class LotsOfBooleans ...