Of course. Finding a Java 1.7 API CHM file can be a bit tricky because Sun/Oracle stopped officially distributing them in this format after Java 1.6. However, you can still find them on community mirrors and third-party sites.

Here is a guide on where to find it, how to use it, and some excellent modern alternatives.

Where to Find the Java 1.7 API CHM File

The most reliable source for these legacy files is the Internet Archive (archive.org), which hosts old software documentation.

Direct Link to the Official Java 1.7.0_80 API Documentation (in CHM format):

• Java SE 7 Documentation (CHM)

This is the official documentation from Oracle, packaged into a CHM file by a community member and preserved for historical use.

How to Download:

1. Go to the link above.
2. On the right-hand side, under "Download Options," click the "CHM" file.
3. Your browser will start downloading Java_API_7u80.chm.

How to Use the CHM File

A CHM (Compiled HTML Help) file is a single help file format common on Windows. To open it:

1. Windows:

   • Simply double-click the .chm file. It should open directly in the default help viewer (like hh.exe).
   • If it doesn't open or shows a "content blocked" warning, right-click the file, select Properties, and click the "Unblock" button. This is a common security feature in modern Windows versions.

2. macOS:

   
   （图片来源网络，侵删）
   • macOS doesn't natively support CHM files. You will need a third-party reader.
   • iChm: A free and popular CHM reader for macOS.
   • BookReader: Another good option that supports various formats.

3. Linux:

   • You will need a CHM viewer package.
   • For Debian/Ubuntu: Install xchm with sudo apt-get install xchm.
   • For Fedora: Install xchm with sudo dnf install xchm.
   • You can also use kchmviewer or gnochm.

⚠️ Important Considerations for Java 1.7

While having the CHM is convenient, it's crucial to understand the context of using such an old version of Java.

• End of Life (EOL): Java 7 reached its official End of Life in April 2025. This means it no longer receives security updates. Running it in a production environment is a significant security risk.
• Outdated Information: The API reflects the state of Java in 2025. Modern Java (8, 11, 17, 21, etc.) has added hundreds of new features, classes, and methods, and deprecated or removed old ones.
• IntelliJ/Eclipse Modern Help: Modern IDEs like IntelliJ IDEA and Eclipse have built-in documentation browsers that are far more powerful than a static CHM file. They provide context-sensitive help, source code navigation, and are kept up-to-date if you have a newer JDK installed.

Modern Alternatives (Highly Recommended)

Instead of using a 10-year-old CHM file, consider these much better options for learning or referencing Java APIs.

A. Official Oracle Documentation (Online)

This is the best and most up-to-date source. You can view any version of the Java SE documentation online.

• Oracle Java SE 7 Documentation (Online): https://docs.oracle.com/javase/7/docs/
• Latest Java Documentation (for comparison): https://docs.oracle.com/en/java/javase/21/

Advantages:

• Always accurate and official.
• Fully searchable.
• Easy to navigate between different versions.
• Works on any OS with a web browser.

B. Built-in IDE Help

If you are using an IDE like IntelliJ IDEA or Eclipse, this is the fastest way to get help.

• IntelliJ IDEA:
  1. Place your cursor on any Java class or method.
  2. Press Ctrl + Q (or Cmd + J on macOS) to see the documentation inline.
  3. Press Shift + F1 to open the full documentation in a separate window.
• Eclipse:
  1. Press F2 while hovering over an element to see a quick info popup.
  2. Use the Help -> Help Contents menu to open the full Eclipse help system, which includes the Javadoc for the JDK you have configured.

Advantages:

• Context-aware. Shows you the documentation for the exact class/method you are looking at.
• Integrates with your code, allowing you to click through to source code.

C. Third-Party API Documentation Sites

These sites often have cleaner interfaces and better search capabilities than the official Oracle docs.

• JavaDoc.io: A modern, fast, and clean Javadoc viewer. You can find the Java 7 docs here: https://www.javadoc.io/doc/javaee/javaee-api/7.0 (Note: This is for the Java EE 7 API, which is built on Java 7 SE. The core SE docs are also available).
• TutorialsPoint: Provides good tutorials and references, including for older Java versions.

Summary

Final Recommendation: For any serious work or learning, use the official online documentation or the help in your IDE. The CHM file is a useful artifact for offline reference or for understanding how things worked in 2025, but it is not the best tool for modern development.