Loads the class given by className such that it acts and feels like a javascript object.

Arguments

• className - The name of the class to create. For subclasses seperate using a '$' (eg. com.nearinfinty.MyClass$SubClass)

Example

var Test = java.import('Test');
Test.someStaticMethodSync(5);
console.log(Test.someStaticField);

var test = new Test();
list.instanceMethodSync('item1');

java.newInstanceSync(className, [args...]) : result

Creates an instance of the specified class. If you are using the sync method an exception will be throw if an error occures, otherwise it will be the first argument in the callback.

Arguments

• className - The name of the class to create. For subclasses seperate using a '$' (eg. com.nearinfinty.MyClass$SubClass)
• callback(err, item) - Callback to be called when the class is created.

Example

var list = java.newInstanceSync("java.util.ArrayList");

java.newInstance("java.util.ArrayList", function(err, list) {
  if(err) { console.error(err); return; }
  // new list
});

java.callStaticMethodSync(className, methodName, [args...]) : result

Calls a static method on the specified class. If you are using the sync method an exception will be throw if an error occures, otherwise it will be the first argument in the callback.

Arguments

• className - The name of the class to call the method on. For subclasses seperate using a '$' (eg. com.nearinfinty.MyClass$SubClass)
• methodName - The name of the method to call.
• callback(err, item) - Callback to be called when the class is created.

Example

var result = java.callStaticMethodSync("com.nearinfinty.MyClass", "doSomething", 42, "test");

java.callStaticMethod("com.nearinfinty.MyClass", "doSomething", 42, "test", function(err, results) {
  if(err) { console.error(err); return; }
  // results from doSomething
});

Gets a static field value from the specified class.

Arguments

• className - The name of the class to get the value from. For subclasses seperate using a '$' (eg. com.nearinfinty.MyClass$SubClass)
• fieldName - The name of the field to get the value from.

Example

var data = java.getStaticFieldValue("com.nearinfinty.MyClass", "data");

Sets a static field value on the specified class.

Arguments

• className - The name of the class to set the value on. For subclasses seperate using a '$' (eg. com.nearinfinty.MyClass$SubClass)
• fieldName - The name of the field to set the value on.
• newValue - The new value to assign to the field.

Example

java.getStaticFieldValue("com.nearinfinty.MyClass", "data", "Hello World");

Creates a new java array of type class.

Arguments

• className - The name of the type of array elements. For subclasses seperate using a '$' (eg. com.nearinfinty.MyClass$SubClass)
• values - A javascript array of values to assign to the java array.

Example

var newArray = java.newArray("java.lang.String", ["item1", "item2", "item3"]);

Creates a new java byte. This is needed because javascript does not have the concept of a byte.

Arguments

• val - The value of the java byte.

Example

var b = java.newByte(12);

Creates a new java short. This is needed because javascript does not have the concept of a short.

Arguments

• val - The value of the java short.

Example

var s = java.newShort(12);

Creates a new java char. This is needed because javascript does not have the concept of a char.

Arguments

• val - The value of the java char.

Example

var ch = java.newChar('a');

Creates a new java Proxy for the given interface. Functions passed in will run on the v8 main thread and not a new thread.

The returned object has two methods ref() and unref() which you can use to maintain references to prevent premature garbage collection. You must call these methods to ensure the proxy stays around.

Arguments

• interfaceName - The name of the interface to proxy. For subclasses seperate using a '$' (eg. com.nearinfinty.MyClass$SubClass)
• functions - A hash of functions matching the function in the interface.

Example

var myProxy = java.newProxy('java.lang.Runnable', {
  run: function () {
    // This is actually run on the v8 thread and not the new java thread
    console.log("hello from thread");
  }
});

var thread = java.newInstanceSync("java.lang.Thread", myProxy);
thread.start();

obj.methodNameSync([args...]) : result

Once you have a java object either by creating a new instance or as a result of a method call you can then call methods on that object. All public, non-static methods are exposed in synchronous and asynchronous flavors.

Arguments

• args - The arguments to pass to the method.
• callback(err, item) - Callback to be called when the method has completed.

Example

var list = java.newInstanceSync("java.util.ArrayList");
list.addSync("item1");
list.add("item2", function(err, result) {
  if(err) { console.error(err); return; }
});

val = obj.fieldName

Once you have a java object either by creating a new instance or as a result of a method call you can get instance field values.

Example

var list = java.newInstanceSync("com.nearinfinty.MyClass");
list.data = "test";
var data = list.data;