java反编译后再编译成class时提示缺少包 - 知否问答 - 万象云+社区

public void setNumTarget(final long numTarget) { this.numTarget = numTarget; } 我想让其变成类似这样的(当然这只是其中一处想要修改的地方,还有几处稍微复杂点的) public void setNumTarget(final long numTarget) { if (numTarget > 5000) { this.numTarget = numTarget; } else { this.numTarget = numTarget * 1000; } } 现在我用luyten-0.5.4.exe 这个软件,将.class反编译成 .java文件后,按照我的要求修改了文件,再想调用javac xx.java 来编译成 .class文件时,提示一堆的错误,我看主要的原因是因为缺少其他的包.比如xx.java的内容如下:

System.out.println("Enter the name of the file to be compiled:"); String fileName = scanner.nextLine(); try { File inputFile = new File(fileName); File outputFile = new File(fileName + ".class"); // 引入包，如：java.util System.out.println("导入包：java.util"); // 将源文件反编译为字节码 byte[] bytecode = Files.readAllBytes(inputFile.toPath()); byte[] classes =反编译(bytecode); // 将字节码反编译为目标文件 byte[] classesFile = Files.write(outputFile.toPath(), classes); System.out.println("Source file " + fileName + " has been compiled to target file " + fileName + ".class"); } catch (FileNotFoundException e) { System.out.println("Error: " + e.getMessage()); } catch (IOException e) { System.out.println("Error: " + e.getMessage()); } } // 将字节码反编译为目标文件 public static byte[]反编译(byte[] bytecode) throws IOException { byte[] classes = new byte[bytecode.length]; // 调用反编译器的API进行字节码反编译 ClassReader reader = new ClassReader(bytecode); ClassWriter writer = new ClassWriter(classes, ClassWriter.COMPUTE_FRAMES); // 创建反编译器对象 Field[] fields = reader.getFields(); for (Field field : fields) { if (!field.isStatic()) { writer.writeField(field.getName(), field.getType(), field.get初始值()); } } // 将反编译后的字节码反编译为类文件 writer.close(); return classes; }

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