diff --git a/Sources/JavaCoderConfig.swift b/Sources/JavaCoderConfig.swift
index 3cf7561..3652001 100644
--- a/Sources/JavaCoderConfig.swift
+++ b/Sources/JavaCoderConfig.swift
@@ -135,7 +135,7 @@ public struct JavaCoderConfig {
 
         RegisterType(type: Float.self, javaClassname: FloatClassname, encodableClosure: { any, _ in
             let value = any as! Float
-            let primitive = try value.javaPrimitive()
+            let primitive = jfloat(value)
             let args = [jvalue(f: primitive)]
             return JNI.NewObject(FloatClass, methodID: FloatConstructor, args: args)!
         }, decodableClosure: { value, _ in
@@ -144,7 +144,7 @@ public struct JavaCoderConfig {
 
         RegisterType(type: Double.self, javaClassname: DoubleClassname, encodableClosure: { any, _ in
             let value = any as! Double
-            let primitive = try value.javaPrimitive()
+            let primitive = jdouble(value)
             let args = [jvalue(d: primitive)]
             return JNI.NewObject(DoubleClass, methodID: DoubleConstructor, args: args)!
         }, decodableClosure: { value, _ in
diff --git a/Sources/JavaEncoder.swift b/Sources/JavaEncoder.swift
index e24e36e..27c9210 100644
--- a/Sources/JavaEncoder.swift
+++ b/Sources/JavaEncoder.swift
@@ -263,11 +263,11 @@ fileprivate class JavaObjectContainer<K : CodingKey> : KeyedEncodingContainerPro
     }
 
     func encode(_ value: Double, forKey key: K) throws {
-        try encodeDouble(try value.javaPrimitive(), key: key.stringValue)
+        try encodeDouble(jdouble(value), key: key.stringValue)
     }
 
     func encode(_ value: Float, forKey key: K) throws {
-        try encodeFloat(try value.javaPrimitive(), key: key.stringValue)
+        try encodeFloat(jfloat(value), key: key.stringValue)
     }
 
     func encode(_ value: Int, forKey key: K) throws {
diff --git a/Sources/JavaPrimitive.swift b/Sources/JavaPrimitive.swift
index 047f4ad..d043e66 100644
--- a/Sources/JavaPrimitive.swift
+++ b/Sources/JavaPrimitive.swift
@@ -6,24 +6,45 @@ import Foundation
 import java_swift
 import CJavaVM
 
+public typealias JavaBoolean = jboolean
+public typealias JavaByte = jbyte
+public typealias JavaShort = jshort
+public typealias JavaInt = jint
+public typealias JavaLong = jlong
+
+#if arch(arm)
+// Looks like calling convention for ARM32 is broken: probably soft-float vs hard-float
+// https://android.googlesource.com/platform/ndk/+/master/docs/HardFloatAbi.md
+// We will replace jfloat with 4-byte jint bit pattern
+public typealias JavaFloat = jint
+#else
+public typealias JavaFloat = jfloat
+#endif
+#if arch(arm)
+// We will replace jdouble with 8-byte jlong bit pattern
+public typealias JavaDouble = jlong
+#else
+public typealias JavaDouble = jdouble
+#endif
+
 extension Bool {
 
-    public init(fromJavaPrimitive javaPrimitive: jboolean) {
+    public init(fromJavaPrimitive javaPrimitive: JavaBoolean) {
         self.init(javaPrimitive == JNI_TRUE)
     }
 
-    public func javaPrimitive() throws -> jboolean {
+    public func javaPrimitive() throws -> JavaBoolean {
         return jboolean(self ? JNI_TRUE : JNI_FALSE)
     }
 }
 
 extension Int {
 
-    public init(fromJavaPrimitive javaPrimitive: jint) {
+    public init(fromJavaPrimitive javaPrimitive: JavaInt) {
         self.init(javaPrimitive)
     }
 
-    public func javaPrimitive(codingPath: [CodingKey] = []) throws -> jint {
+    public func javaPrimitive(codingPath: [CodingKey] = []) throws -> JavaInt {
         if self < Int(Int32.min) || self > Int(Int32.max) {
             let errorDescription = "Not enough bits to represent Int"
             let context = EncodingError.Context(codingPath: codingPath, debugDescription: errorDescription)
@@ -35,51 +56,51 @@ extension Int {
 
 extension Int8 {
 
-    public init(fromJavaPrimitive javaPrimitive: jbyte) {
+    public init(fromJavaPrimitive javaPrimitive: JavaByte) {
         self.init(javaPrimitive)
     }
 
-    public func javaPrimitive() throws -> jbyte {
+    public func javaPrimitive() throws -> JavaByte {
         return jbyte(self)
     }
 }
 
 extension Int16 {
 
-    public init(fromJavaPrimitive javaPrimitive: jshort) {
+    public init(fromJavaPrimitive javaPrimitive: JavaShort) {
         self.init(javaPrimitive)
     }
 
-    public func javaPrimitive() throws -> jshort {
+    public func javaPrimitive() throws -> JavaShort {
         return jshort(self)
     }
 }
 
 extension Int32 {
 
-    public init(fromJavaPrimitive javaPrimitive: jint) {
+    public init(fromJavaPrimitive javaPrimitive: JavaInt) {
         self.init(javaPrimitive)
     }
 
-    public func javaPrimitive() throws -> jint {
+    public func javaPrimitive() throws -> JavaInt {
         return jint(self)
     }
 }
 
 extension Int64 {
 
-    public init(fromJavaPrimitive javaPrimitive: jlong) {
+    public init(fromJavaPrimitive javaPrimitive: JavaLong) {
         self.init(javaPrimitive)
     }
 
-    public func javaPrimitive() throws -> jlong {
+    public func javaPrimitive() throws -> JavaLong {
         return jlong(self)
     }
 }
 
 extension UInt {
 
-    public init(fromJavaPrimitive javaPrimitive: jint) {
+    public init(fromJavaPrimitive javaPrimitive: JavaInt) {
         #if arch(x86_64) || arch(arm64)
         self.init(UInt32(bitPattern: javaPrimitive))
         #else
@@ -87,7 +108,7 @@ extension UInt {
         #endif
     }
 
-    public func javaPrimitive(codingPath: [CodingKey] = []) throws -> jint {
+    public func javaPrimitive(codingPath: [CodingKey] = []) throws -> JavaInt {
         if self < UInt(UInt32.min) || self > UInt(UInt32.max) {
             let errorDescription = "Not enough bits to represent UInt"
             let context = EncodingError.Context(codingPath: codingPath, debugDescription: errorDescription)
@@ -103,29 +124,29 @@ extension UInt {
 
 extension UInt8 {
 
-    public init(fromJavaPrimitive javaPrimitive: jbyte) {
+    public init(fromJavaPrimitive javaPrimitive: JavaByte) {
         self.init(bitPattern: javaPrimitive)
     }
 
-    public func javaPrimitive() throws -> jbyte {
+    public func javaPrimitive() throws -> JavaByte {
         return jbyte(bitPattern: self)
     }
 }
 
 extension UInt16 {
 
-    public init(fromJavaPrimitive javaPrimitive: jshort) {
+    public init(fromJavaPrimitive javaPrimitive: JavaShort) {
         self.init(bitPattern: javaPrimitive)
     }
 
-    public func javaPrimitive() throws -> jshort {
+    public func javaPrimitive() throws -> JavaShort {
         return jshort(bitPattern: self)
     }
 }
 
 extension UInt32 {
 
-    public init(fromJavaPrimitive javaPrimitive: jint) {
+    public init(fromJavaPrimitive javaPrimitive: JavaInt) {
         #if arch(x86_64) || arch(arm64)
         self.init(bitPattern: javaPrimitive)
         #else
@@ -133,7 +154,7 @@ extension UInt32 {
         #endif
     }
 
-    public func javaPrimitive() throws -> jint {
+    public func javaPrimitive() throws -> JavaInt {
         #if arch(x86_64) || arch(arm64)
         return jint(bitPattern: self)
         #else
@@ -144,11 +165,11 @@ extension UInt32 {
 
 extension UInt64 {
 
-    public init(fromJavaPrimitive javaPrimitive: jlong) {
+    public init(fromJavaPrimitive javaPrimitive: JavaLong) {
         self.init(bitPattern: javaPrimitive)
     }
 
-    public func javaPrimitive() throws -> jlong {
+    public func javaPrimitive() throws -> JavaLong {
         return jlong(bitPattern: self)
     }
 }
@@ -159,8 +180,18 @@ extension Float {
         self.init(javaPrimitive)
     }
 
-    public func javaPrimitive() throws -> jfloat {
-        return jfloat(self)
+    #if arch(arm)
+    public init(fromJavaPrimitive javaPrimitive: jint) {
+        self.init(bitPattern: UInt32(bitPattern: Int32(javaPrimitive)))
+    }
+    #endif
+
+    public func javaPrimitive() throws -> JavaFloat {
+        #if arch(arm)
+        return jint(Int32(bitPattern: bitPattern))
+        #else
+        return self
+        #endif
     }
 }
 
@@ -170,7 +201,64 @@ extension Double {
         self.init(javaPrimitive)
     }
 
-    public func javaPrimitive() throws -> jdouble {
-        return jdouble(self)
+    #if arch(arm)
+    public init(fromJavaPrimitive javaPrimitive: jlong) {
+        self.init(bitPattern: UInt64(javaPrimitive))
+    }
+    #endif
+
+    public func javaPrimitive() throws -> JavaDouble {
+        #if arch(arm)
+        return jlong(bitPattern: bitPattern)
+        #else
+        return self
+        #endif
     }
-}
\ No newline at end of file
+}
+
+
+
+extension JavaBoolean {
+    public static func defaultValue() -> JavaBoolean {
+        return jboolean(JNI_FALSE)
+    }
+}
+
+extension JavaByte {
+    public static func defaultValue() -> JavaByte {
+        return 0
+    }
+}
+
+extension JavaShort {
+    public static func defaultValue() -> JavaShort {
+        return 0
+    }
+}
+
+extension JavaInt {
+    public static func defaultValue() -> JavaInt {
+        return 0
+    }
+}
+
+extension JavaLong {
+    public static func defaultValue() -> JavaLong {
+        return 0
+    }
+}
+
+#if arch(arm)
+#else
+extension JavaFloat {
+    public static func defaultValue() -> JavaFloat {
+        return 0
+    }
+}
+
+extension JavaDouble {
+    public static func defaultValue() -> JavaDouble {
+        return 0
+    }
+}
+#endif
\ No newline at end of file