STJS is an open source (Apache 2.0 licensed) Javascript code generator from a Java source. It is built as a Maven plugin that can be executed after the compilation of your Java code.
Our full website can be found at http://st-js.org
ST-JS compiles with the traditional mvn install command, but it currently needs both Java 6 - that is the default JDK on the command line when you call the Maven command, but also Java 8 to compile the generator-plugin-java8 artifact. To achieve this, you need to to configure the environment variable JAVA8_HOME that points to the home of your JDK 8 home folder.
AnyNonPrimitiveType[] is Array
String[] a = {"a", "b"};var a = ["a", "b"];float[][][] arr = new float[1][2][3];
Object[][][] objarr = new Object[][][]{ new String[][]{ { "hello" }, { "world" }, new String[]{} }, new Integer[][]{ { 1, 2 }, { 3, 4 } }, new Double[4][5] };var arr = Array.apply(null, Array(1)).map(function(){return Array.apply(null, Array(2)).map(function(){return new Float32Array(3);});});"
var objarr = [[["hello"], ["world"], []], [[1, 2], [3, 4]], Array.apply(null, Array(4)).map(function() { return Array(5);})];| Java | JavaScript |
|---|---|
boolean[] |
Int8Array |
byte[] |
Int8Array |
short[] |
Int16Array |
char[] |
Uint16Array |
int[] |
Int32Array |
float[] |
Float32Array |
double[] |
Float64Array |
long[] |
Array |
Enhanced for loop over Java arrays will iterate over values instead of keys
String[] msg = {"hello", "world"};
for(String s : msg) {
console.log(s);
}var msg = ["hello", "world"];
for(var index$s = 0, arr$s = msg; index$s < arr$s.length; index$s++) {
var s = arr$s[index$s];
console.log(s);
}There is no support for 64bit integer type in JavaScript. Max value for an integer is 2^53-1
> Number.MAX_SAFE_INTEGER
9007199254740991
char is stored in Java as unsigned short so it is in st-js primitive support.
char[] in st-js is Uint16Array.
The following side effects appear:
String a = "hello worl";
char c = 'd';
String result = a + c;var a = "hello worl";
var c = 'd'.charCodeAt(0); //looks ugly but compatible
var result = a + String.fromCharCode(c);char c = 'a';
byte b = (byte) c;var c = 'a'.charCodeAt(0);
var b = c << 24 >> 24;Are considered equivalent no attempt for Java compatibility is made.
| Java | JavaScript |
|---|---|
| int to short | ((i)<<16>>16) |
| int to byte | ((i)<<24>>24) |
| int to char | ((i)&0xfff) |
| int to long | var l = i |
| int to float | var f = i |
| int to double | var d = i |
| short to byte | ((s)<<24>>24) |
| short to char | ((s)&0xfff) |
| short to int | var i = s |
| short to long | var l = s |
| short to float | var f = s |
| short to double | var d = s |
| byte to short | var s = b |
| byte to char | var c = b |
| byte to int | var i = b |
| byte to long | var l = b |
| byte to float | var f = b |
| byte to double | var d = b |
| char to byte | ((c)<<24>>24) |
| char to short | var s = c |
| char to int | var i = c |
| char to long | var l = c |
| char to float | var f = c |
| char to double | var d = c |
| long to byte | ((l)<<24>>24) |
| long to short | ((l)<<16>>16) |
| long to char | ((l)&0xfff) |
| long to int | var i = l|0 |
| long to float | var f = l |
| long to double | var d = l |
| float to byte | ((f)<<24>>24) |
| float to short | ((f)<<16>>16) |
| float to char | ((f)&0xfff) |
| float to int | var i = f|0 |
| float to long | var l = stjs.trunc(f) |
| float to double | var d = f |
| double to byte | ((d)<<24>>24) |
| double to short | ((d)<<16>>16) |
| double to char | ((d)&0xfff) |
| double to int | var i = d|0 |
| double to long | var l = stjs.trunc(d) |
| double to float | var f = d |
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent