diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/JavaToJKTreeBuilder.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/JavaToJKTreeBuilder.kt
index 73d297cd4c2..f64e866f58f 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/JavaToJKTreeBuilder.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/JavaToJKTreeBuilder.kt
@@ -23,6 +23,7 @@ import com.intellij.psi.impl.source.tree.java.PsiLiteralExpressionImpl
 import com.intellij.psi.impl.source.tree.java.PsiNewExpressionImpl
 import com.intellij.psi.impl.source.tree.java.PsiReferenceExpressionImpl
 import org.jetbrains.kotlin.j2k.tree.*
+import org.jetbrains.kotlin.j2k.tree.JKLiteralExpression.LiteralType.*
 import org.jetbrains.kotlin.j2k.tree.impl.*
 
 
@@ -87,17 +88,20 @@ class JavaToJKTreeBuilder(var symbolProvider: JKSymbolProvider) {
         }
 
         fun PsiLiteralExpression.toJK(): JKLiteralExpression {
-            if (this !is PsiLiteralExpressionImpl) {
-                throw RuntimeException("Not supported")
+            require(this is PsiLiteralExpressionImpl)
+
+            return when (this.literalElementType) {
+                JavaTokenType.NULL_KEYWORD -> JKNullLiteral()
+                JavaTokenType.TRUE_KEYWORD -> JKBooleanLiteral(true)
+                JavaTokenType.FALSE_KEYWORD -> JKBooleanLiteral(false)
+                JavaTokenType.STRING_LITERAL -> JKJavaLiteralExpressionImpl(innerText!!, STRING)
+                JavaTokenType.CHARACTER_LITERAL -> JKJavaLiteralExpressionImpl(innerText!!, CHAR)
+                JavaTokenType.INTEGER_LITERAL -> JKJavaLiteralExpressionImpl(text, INT)
+                JavaTokenType.LONG_LITERAL -> JKJavaLiteralExpressionImpl(text, LONG)
+                JavaTokenType.FLOAT_LITERAL -> JKJavaLiteralExpressionImpl(text, FLOAT)
+                JavaTokenType.DOUBLE_LITERAL -> JKJavaLiteralExpressionImpl(text, DOUBLE)
+                else -> error("Unknown literal element type: ${this.literalElementType}")
             }
-            return JKJavaLiteralExpressionImpl(
-                innerText!!, when (this.literalElementType) {
-                    JavaTokenType.STRING_LITERAL -> JKLiteralExpression.LiteralType.STRING
-                    JavaTokenType.TRUE_KEYWORD, JavaTokenType.FALSE_KEYWORD -> JKLiteralExpression.LiteralType.BOOLEAN
-                    JavaTokenType.NULL_KEYWORD -> JKLiteralExpression.LiteralType.NULL
-                    else -> throw RuntimeException("Not supported")
-                }
-            )
         }
 
         fun PsiJavaToken.toJK(): JKOperator = when (tokenType) {
diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/j.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/j.kt
index 92313001ea6..f8d8169d5a2 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/j.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/j.kt
@@ -17,6 +17,7 @@
 package org.jetbrains.kotlin.j2k.tree.impl
 
 import org.jetbrains.kotlin.j2k.tree.*
+import org.jetbrains.kotlin.j2k.tree.JKLiteralExpression.LiteralType.*
 import org.jetbrains.kotlin.j2k.tree.visitors.JKVisitor
 import org.jetbrains.kotlin.resolve.jvm.JvmPrimitiveType
 
@@ -58,6 +59,10 @@ class JKJavaLiteralExpressionImpl(
     override val type: JKLiteralExpression.LiteralType
 ) : JKJavaLiteralExpression, JKElementBase() {
     override fun <R, D> accept(visitor: JKVisitor<R, D>, data: D): R = visitor.visitJavaLiteralExpression(this, data)
+
+    init {
+        require(type in setOf(STRING, CHAR, INT, LONG, FLOAT, DOUBLE))
+    }
 }
 
 
diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/jk.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/jk.kt
index ebbc9e9d0a5..fd1b8c256b1 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/jk.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/jk.kt
@@ -18,6 +18,9 @@ package org.jetbrains.kotlin.j2k.tree.impl
 
 import org.jetbrains.kotlin.j2k.ast.Nullability
 import org.jetbrains.kotlin.j2k.tree.*
+import org.jetbrains.kotlin.j2k.tree.JKLiteralExpression.LiteralType
+import org.jetbrains.kotlin.j2k.tree.JKLiteralExpression.LiteralType.BOOLEAN
+import org.jetbrains.kotlin.j2k.tree.JKLiteralExpression.LiteralType.NULL
 import org.jetbrains.kotlin.j2k.tree.visitors.JKVisitor
 
 class JKClassImpl(
@@ -135,4 +138,16 @@ class JKClassTypeImpl(
     override val nullability: Nullability = Nullability.Default
 ) : JKClassType
 
-class JKNullLiteral : JKExpression, JKElementBase()
\ No newline at end of file
+class JKNullLiteral : JKLiteralExpression, JKElementBase() {
+    override val literal: String
+        get() = "null"
+    override val type: LiteralType
+        get() = NULL
+}
+
+class JKBooleanLiteral(val value: Boolean) : JKLiteralExpression, JKElementBase() {
+    override val literal: String
+        get() = value.toString()
+    override val type: LiteralType
+        get() = BOOLEAN
+}
diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/jk.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/jk.kt
index 87c145986ba..14561390aed 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/jk.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/jk.kt
@@ -136,7 +136,7 @@ interface JKLiteralExpression : JKExpression {
     val type: LiteralType
 
     enum class LiteralType {
-        STRING, BOOLEAN, NULL
+        STRING, CHAR, BOOLEAN, NULL, INT, LONG, FLOAT, DOUBLE
     }
 }