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最新评论
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suyujie:
引用
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suyujie:
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suyujie:
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iamzhoug37:
您能说一下"局部变量不受文本顺序限制" 是 ...
声明前为什么能赋值却不能输出,都是使用
This often heard saying is not correct: "primitives are passed by value, and objects are passed by reference"
in Java everything is passed by value. Primitives are passed by value, and object references are passed by value. The objects themselves are never passed to a method, but the objects are always in the heap and only a reference(value) to the object is passed to the method.
http://stackoverflow.com/questions/40480/is-java-pass-by-reference
http://javadude.com/articles/passbyvalue.htm
just refer to the following two definitions and maybe you'd find the answer.
发表评论
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NullPointerException in ternary operator
2013-01-19 00:01 1070java代码: Integer i = null; ... -
why concrete class must implement abstract method while abstract class need not
2011-05-11 13:27 1470yes, just as the title...why co ... -
Enum singleton - Elvis Stealer
2011-04-26 14:41 1602import java.io.ByteArrayInputSt ... -
why can inner class be instantiated in this way?
2011-04-06 10:24 967public class Outer { pub ... -
into native source code
2011-03-23 23:09 907once there was a problem occurr ... -
about Thread.join method
2011-03-23 08:09 1227import java.util.Timer; import ... -
why is static inner class singleton thread safe?
2011-03-15 09:03 1416http://en.wikipedia.org/wiki/In ... -
why string concatenation yields no interned one
2011-03-14 16:48 1080public class Test { public st ... -
why can bit mask suppress sign extention
2011-03-10 09:16 1139yes, bit mask can suppress sign ... -
About gc two objects which are inter referenced to each other
2011-03-08 11:00 996my workmate told me such a sena ... -
circumvents exception checking
2011-03-03 11:02 924import java.io.IOException; ... -
关于维基中singleton pattern的一段
2011-02-24 10:00 1062Another notable difference is t ... -
why List hasn't clone method but the ArrayList has
2011-02-16 15:27 1121List list = new ArrayList(); ... -
deep copy
2011-02-16 15:20 977static public Object deepCopy(O ... -
不是说字符串不可变吗
2011-02-14 11:28 865from csdn: http://topic.csdn.ne ... -
没有实现抽象方法的具体类居然编译通过了
2011-02-04 22:29 932来自csdn: http://topic.csdn.net/ ... -
关于iterator的fail-fast
2011-01-20 11:15 954是使用集合的iterator后,再改变就可能抛出这个异常 ... -
生成几个String的问题
2011-01-11 16:26 979public class Test extends java. ... -
无符号右移>>>
2011-01-11 15:46 2303public class Test { public st ... -
Struts2之log信息不出的问题
2010-12-30 11:18 2966刚开始学习Struts2的时候,用的是maven方式,但是却不 ...
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