JD-Core

Description

How to build JD-Core ?

> git clone https://github.com/java-decompiler/jd-core.git
> cd jd-core
> ./gradlew build

How to use JD-Core ?

Example

Loader loader = new Loader() {
 @Override
 public byte[] load(String internalName) throws LoaderException {
 InputStream is = this.getClass().getResourceAsStream("/" + internalName + ".class");
 if (is == null) {
 return null;
 } else {
 try (InputStream in=is; ByteArrayOutputStream out=new ByteArrayOutputStream()) {
 byte[] buffer = new byte[1024];
 int read = in.read(buffer);
 while (read > 0) {
 out.write(buffer, 0, read);
 read = in.read(buffer);
 }
 return out.toByteArray();
 } catch (IOException e) {
 throw new LoaderException(e);
 }
 }
 }
 @Override
 public boolean canLoad(String internalName) {
 return this.getClass().getResource("/" + internalName + ".class") != null;
 }
};

Printer printer = new Printer() {
 protected static final String TAB = " ";
 protected static final String NEWLINE = "\n";
 protected int indentationCount = 0;
 protected StringBuilder sb = new StringBuilder();
 @Override public String toString() { return sb.toString(); }
 @Override public void start(int maxLineNumber, int majorVersion, int minorVersion) {}
 @Override public void end() {}
 @Override public void printText(String text) { sb.append(text); }
 @Override public void printNumericConstant(String constant) { sb.append(constant); }
 @Override public void printStringConstant(String constant, String ownerInternalName) { sb.append(constant); }
 @Override public void printKeyword(String keyword) { sb.append(keyword); }
 @Override public void printDeclaration(int type, String internalTypeName, String name, String descriptor) { sb.append(name); }
 @Override public void printReference(int type, String internalTypeName, String name, String descriptor, String ownerInternalName) { sb.append(name); }
 @Override public void indent() { this.indentationCount++; }
 @Override public void unindent() { this.indentationCount--; }
 @Override public void startLine(int lineNumber) { for (int i=0; i<indentationCount; i++) sb.append(TAB); }
 @Override public void endLine() { sb.append(NEWLINE); }
 @Override public void extraLine(int count) { while (count-- > 0) sb.append(NEWLINE); }
 @Override public void startMarker(int type) {}
 @Override public void endMarker(int type) {}
};

ClassFileToJavaSourceDecompiler decompiler = new ClassFileToJavaSourceDecompiler();
decompiler.decompile(loader, printer, "path/to/YourClass");
String source = printer.toString();

License