diff --git a/jdk.js b/jdk.js
index 64e978e..48f9bd2 100755
--- a/jdk.js
+++ b/jdk.js
@@ -229,6 +229,8 @@
 							return '() => {' + p1.replaceAll('\\n', '\n') + '}';
 						});
 
+						trans.replace(/catch \(\w*/gm, 'catch (');
+
 						trans = trans.replace(/(\([^\(\)]*\) =>)/gm, 'async $1');
 
 						let prefix = `(jdk.imports['${packageName}.${className}'] = {}).load = async () => {\n\n`;
@@ -250,6 +252,7 @@
 
 						let suffix = '\n';
 						suffix += `window.${className} = ${className};\n`;
+						suffix += `console.log("loaded ${className}.java");\n`;
 						suffix += '};';
 
 						trans = prefix + trans + suffix;
@@ -19116,7 +19119,17 @@
 						const classVarsMap = {};
 
 						let asyncMethods = {
-							Scanner: ['next', 'nextLine', 'nextInt', 'nextShort', 'nextLong', 'nextFloat', 'nextDouble']
+							Scanner: [
+								'hasNext',
+								'hasNextLine',
+								'next',
+								'nextLine',
+								'nextInt',
+								'nextShort',
+								'nextLong',
+								'nextFloat',
+								'nextDouble'
+							]
 						};
 						if (typeof QuintOS != 'undefined') {
 							Object.assign(asyncMethods, {
diff --git a/jdk/java/io/FileNotFoundException.js b/jdk/java/io/FileNotFoundException.js
new file mode 100644
index 0000000..9b46c66
--- /dev/null
+++ b/jdk/java/io/FileNotFoundException.js
@@ -0,0 +1,4 @@
+jdk.imports['java.io.FileNotFoundException'].load = async () => {
+	class FileNotFoundException {}
+	jdk.java.io.FileNotFoundException = FileNotFoundException;
+};
diff --git a/jdk/java/lang/System.js b/jdk/java/lang/System.js
index 9eccb90..f0fea6e 100755
--- a/jdk/java/lang/System.js
+++ b/jdk/java/lang/System.js
@@ -12,6 +12,10 @@ jdk.imports['java.lang.System'].load = async () => {
 		System.in.mark += length;
 	};
 
+	System.getProperty = (prop) => {
+		return '';
+	};
+
 	System.arraycopy = (src, srcPos, dest, destPos, numElements) => {
 		if (
 			(dest instanceof Float64Array || dest instanceof Int32Array) &&
diff --git a/jdk/java/util/Scanner.js b/jdk/java/util/Scanner.js
index 9f510aa..2aa5173 100755
--- a/jdk/java/util/Scanner.js
+++ b/jdk/java/util/Scanner.js
@@ -1,29 +1,38 @@
 jdk.imports['java.util.Scanner'].load = async () => {
-	const File = await jdk.import('java.io.File');
+	const InputStream = await jdk.import('java.io.InputStream');
 
 	class Scanner {
 		constructor(input) {
-			if (input instanceof File) {
-				this.inputType = 'File';
-				throw 'unsupported Scanner input type: File';
+			if (input.getAbsolutePath) {
+				this._loading = true;
+				this._filePath = input.getAbsolutePath();
+				return;
 			}
 			this.in = input;
 		}
-		hasNext(pattern) {
+		async _loadFile(filePath) {
+			this.in = new InputStream();
+			this.in.stream = await (await fetch(filePath)).text();
+			this._loading = false;
+		}
+		async hasNext(pattern) {
+			if (this._loading) {
+				await this._loadFile(this._filePath);
+			}
 			if (pattern instanceof RegExp) {
 				return pattern.test(this.in.stream.slice(this.in.mark));
 			}
 			// if pattern is string
-			return this.in.stream.includes(pattern);
+			return this.in.stream.slice(this.in.mark).includes(pattern);
 		}
-		hasNextLine() {
+		async hasNextLine() {
 			return this.hasNext('\n');
 		}
 		async nextLine() {
 			return await this.next(/.*\n/);
 		}
 		async next(pattern) {
-			while (!this.hasNext(pattern)) {
+			while (this._loading || !this.hasNext(pattern)) {
 				await new Promise((done) => setTimeout(() => done(), 100));
 			}
 			let buf = this.in.stream.slice(this.in.mark);
diff --git a/package.json b/package.json
index 36a1939..d5cdb28 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "java2js",
-	"version": "1.2.3",
+	"version": "1.2.4",
 	"description": "Converts Java to JavaScript and runs it with a JS JDK",
 	"main": "jdk.js",
 	"scripts": {