如何使用proguard混淆除公共方法名称和属性以外的所有内容？

玩了一段时间后，我发现以下内容有效

-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontpreverify
-verbose

-keep, allowobfuscation class com.company.*
-keepclassmembers, allowobfuscation class * {
    *;
}

-keepnames class com.company.MyClass
-keepclassmembernames class com.company.MyClass {
    public <methods>;
    public <fields>;
    #!private *; also tried this but it didn't work
}

配置中的错误是{ *; }在-keepnames选项末尾出现。

我使用了以下课程：

package com.company;

public class MyClass {
  public static void main(String[] args) {
    int longVariableName = publicStaticMethod();
    String abcxyz = privateStaticMethod("abc", "xyz");
    System.out.println("longVariableName: " + longVariableName);
    System.out.println("abcxyz: " + abcxyz);
  }

  public static int publicStaticMethod() {
    return 9000;
  }

  private static String privateStaticMethod(String first, String second) {
    return first + second;
  }
}

反编译的结果类是这样的：

package com.company;

import java.io.PrintStream;

public class MyClass {
  public static void main(String[] paramArrayOfString) {
    paramArrayOfString = publicStaticMethod();
    String str = a("abc", "xyz");
    System.out.println("longVariableName: " + paramArrayOfString);
    System.out.println("abcxyz: " + str);
  }

  public static int publicStaticMethod() {
    return 9000;
  }

  private static String a(String paramString1, String paramString2) {
    return paramString1 + paramString2;
  }
}