Java Native Method[还没来得及翻译]
The goal for this chapter is to introduce you to Java's native methods. If you are new to Java, you may not know what native methods are, and even if you are an experienced Java developer, you may not have had a reason to learn more about native methods. At the conclusion of this chapter you should have a better understanding of what native methods are, when and why you may want to use them, and the consequences of using them. You should also have a basic understanding of how native methods work. You will then be more than ready to tackle the next three chapters, which dive into the nitty-gritty details of Java's Native Methods.
What Is a Native Method?
Simply put, a native method is the Java interface to non-Java code. It is Java's link to the "outside world." More specifically, a native method is a Java method whose implementation is provided by non-Java code, most likely C (see Figure 30.1). This feature is not special to Java. Most languages provide some mechanism to call routines written in another language. In C++, you must use the extern "C" stmt to signal that the C++ compiler is making a call to C functions. It is common to see the qualifier pascal in many C compilers to signal that the calling convention should be done in a Pascal convention, rather than a C convention. FORTRAN and Pascal have similar facilities, as do most other languages.
Figure 30.1 : A native method is a Java method whose implementation is provided by non-java code.
In Java, this is done via native methods. In your Java class, you mark the methods you wish to implement outside of Java with the native method modifier-much like you would use the public or static modifiers. Then, rather than supplying the method's body, you simply place a semicolon in its place. As an example, the following class defines a variety of native methods:
public class IHaveNatives
{
native public void Native1( int x ) ;
native static public long Native2() ;
native synchronized private float Nativ
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java中静态变量和静态方法分别有什么特点？
悬赏分：0 - 解决时间：2006-4-10 10:28
提问者： vv_clear - 二级
最佳答案
为什么问了两次？再贴上另一篇
Thinking:Java中static用法- -
Tag： Thinking:Java中s
一、static
请先看下面这段程序：
public class ......
下面的程序所要做的事情正是前一个谜题所做的事情，但是它没有假设斜杠符号就是分隔文件名组成部分的符号。相反，该程序使用的是java.io.File.separator，它被指定为一个公共的String域，包含了平台相关的文件名分隔符。那么，这个程序会打印出其正确的、平台相关的类文件名吗？
package com.javapuzzlers;
import java. ......
下面的程序将打印一个单词，其第一个字母是由一个随机数生成器来选择的。请描述该程序的行为：
import java.util.Random;
public class Rhymes {
private static Random rnd = new Random();
public static void main(String[] args) {
StringBuffer word = null;
switch(rnd.nextInt(2)) {
......
下面的程序对一个变量重复地进行增量操作，然后打印它的值。那么这个值是什么呢？
public class Increment {
public static void main(String[] args) {
int j = 0;
for (int i = 0; i < 100; i++)
j = j++;
System.out.println(j);
}
}
乍一看，这个程序可能� ......
