https://github.com/douglascrockford/JSON-java: JSON is a light-weight, language independent, data interchange format. See http://www.JSON.org/ The files in this package implement JSON encoders/decoders in Java. It also includes the capability to convert between JSON and XML, HTTP headers, Cookies, and CDL. This is a reference implementation. There is a large number of JSON packages in Java. Perhaps someday the Java community will standardize on one. Until then, choose carefully. The license includes this restriction: "The software shall be used for good, not evil." If your conscience cannot live with that, then choose a different package.
  • Douglas Crockford 
public class org.json.Property
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.json.Property
  super_class: java.lang.Object
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.json.Property this
         0: .line 35
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.json.Property this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/json/Property;

  public static org.json.JSONObject toJSONObject(java.util.Properties);
    descriptor: (Ljava/util/Properties;)Lorg/json/JSONObject;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=4, args_size=1
        start local 0 // java.util.Properties properties
         0: .line 45
            new org.json.JSONObject
            dup
            invokespecial org.json.JSONObject.<init>:()V
            astore 1 /* jo */
        start local 1 // org.json.JSONObject jo
         1: .line 46
            aload 0 /* properties */
            ifnull 7
            aload 0 /* properties */
            invokevirtual java.util.Properties.isEmpty:()Z
            ifne 7
         2: .line 47
            aload 0 /* properties */
            invokevirtual java.util.Properties.propertyNames:()Ljava/util/Enumeration;
            astore 2 /* enumProperties */
        start local 2 // java.util.Enumeration enumProperties
         3: .line 48
            goto 6
         4: .line 49
      StackMap locals: org.json.JSONObject java.util.Enumeration
      StackMap stack:
            aload 2 /* enumProperties */
            invokeinterface java.util.Enumeration.nextElement:()Ljava/lang/Object;
            checkcast java.lang.String
            astore 3 /* name */
        start local 3 // java.lang.String name
         5: .line 50
            aload 1 /* jo */
            aload 3 /* name */
            aload 0 /* properties */
            aload 3 /* name */
            invokevirtual java.util.Properties.getProperty:(Ljava/lang/String;)Ljava/lang/String;
            invokevirtual org.json.JSONObject.put:(Ljava/lang/String;Ljava/lang/Object;)Lorg/json/JSONObject;
            pop
        end local 3 // java.lang.String name
         6: .line 48
      StackMap locals:
      StackMap stack:
            aload 2 /* enumProperties */
            invokeinterface java.util.Enumeration.hasMoreElements:()Z
            ifne 4
        end local 2 // java.util.Enumeration enumProperties
         7: .line 53
      StackMap locals:
      StackMap stack:
            aload 1 /* jo */
            areturn
        end local 1 // org.json.JSONObject jo
        end local 0 // java.util.Properties properties
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    8     0      properties  Ljava/util/Properties;
            1    8     1              jo  Lorg/json/JSONObject;
            3    7     2  enumProperties  Ljava/util/Enumeration<*>;
            5    6     3            name  Ljava/lang/String;
    Exceptions:
      throws org.json.JSONException
    MethodParameters:
            Name  Flags
      properties  

  public static java.util.Properties toProperties(org.json.JSONObject);
    descriptor: (Lorg/json/JSONObject;)Ljava/util/Properties;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=5, args_size=1
        start local 0 // org.json.JSONObject jo
         0: .line 63
            new java.util.Properties
            dup
            invokespecial java.util.Properties.<init>:()V
            astore 1 /* properties */
        start local 1 // java.util.Properties properties
         1: .line 64
            aload 0 /* jo */
            ifnull 8
         2: .line 66
            aload 0 /* jo */
            invokevirtual org.json.JSONObject.keySet:()Ljava/util/Set;
            invokeinterface java.util.Set.iterator:()Ljava/util/Iterator;
            astore 3
            goto 7
      StackMap locals: org.json.JSONObject java.util.Properties top java.util.Iterator
      StackMap stack:
         3: aload 3
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast java.lang.String
            astore 2 /* key */
        start local 2 // java.lang.String key
         4: .line 67
            aload 0 /* jo */
            aload 2 /* key */
            invokevirtual org.json.JSONObject.opt:(Ljava/lang/String;)Ljava/lang/Object;
            astore 4 /* value */
        start local 4 // java.lang.Object value
         5: .line 68
            getstatic org.json.JSONObject.NULL:Ljava/lang/Object;
            aload 4 /* value */
            invokevirtual java.lang.Object.equals:(Ljava/lang/Object;)Z
            ifne 7
         6: .line 69
            aload 1 /* properties */
            aload 2 /* key */
            aload 4 /* value */
            invokevirtual java.lang.Object.toString:()Ljava/lang/String;
            invokevirtual java.util.Properties.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        end local 4 // java.lang.Object value
        end local 2 // java.lang.String key
         7: .line 66
      StackMap locals:
      StackMap stack:
            aload 3
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 3
         8: .line 73
      StackMap locals: org.json.JSONObject java.util.Properties
      StackMap stack:
            aload 1 /* properties */
            areturn
        end local 1 // java.util.Properties properties
        end local 0 // org.json.JSONObject jo
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    9     0          jo  Lorg/json/JSONObject;
            1    9     1  properties  Ljava/util/Properties;
            4    7     2         key  Ljava/lang/String;
            5    7     4       value  Ljava/lang/Object;
    Exceptions:
      throws org.json.JSONException
    MethodParameters:
      Name  Flags
      jo    
}
SourceFile: "Property.java"