javadoc工具将你Java程序的源代码作为输入，输出一些包含你程序注释的HTML文件。
每一个类的信息将在独自的HTML文件里。javadoc也可以输出继承的树形结构和索引。
由于javadoc的实现不同，工作也可能不同，你需要检查你的Java开发系统的版本等细节，选择合适的Javadoc版本。
实例
下面是一个使用说明注释的简单实例。注意每一个注释都在它描述的项目的前面。
在经过javadoc处理之后，SquareNum类的注释将在SquareNum.html中找到。
import java.io.*;
/**
* This class demonstrates documentation comments.
* @author Ayan Amhed
* @version 1.2
*/
public class SquareNum {
/**
* This method returns the square of num.
* This is a multiline description. You can use
* as many lines as you like.
* @param num The value to be squared.
* @return num squared.
*/
public double square(double num) {
return num * num;
}
/**
* This method inputs a number from the user.
* @return The value input as a double.
* @exception IOException On input error.
* @see IOException
*/
public double getNumber() throws IOException {
InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader inData = new BufferedReader(isr);
String str;
str = inData.readLine();
return (new Double(str)).doubleValue();
}
/**
* This method demonstrates square().
* @param args Unused.
* @return Nothing.
* @exception IOException On input error.
* @see IOException
*/
public static void main(String args[]) throws IOException
{
SquareNum ob = new SquareNum();
double val;
System.out.println("Enter value to be squared: ");
val = ob.getNumber();
val = ob.square(val);
System.out.println("Squared value is " + val);
}
}
如下，使用javadoc工具处理SquareNum.java文件：
$ javadoc SquareNum.java
Loading source file SquareNum.java...
Constructing Javadoc information...
Standard Doclet version 1.5.0_13
Building tree for all the packages and classes...
Generating SquareNum.html...
SquareNum.java:39: warning - @return tag cannot be used\
in method with void return type.
Generating package-frame.html...
Generating package-summary.html...
Generating package-tree.html...
Generating constant-values.html...
Building index for all the packages and classes...
Generating overview-tree.html...
Generating index-all.html...
Generating deprecated-list.html...
Building index for all classes...
Generating allclasses-frame.html...
Generating allclasses-noframe.html...
Generating index.html...
Generating help-doc.html...
Generating stylesheet.css...
1 warning
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