Question

在下文中，是否有更好的方法来初始化acc？

// . . .
private DoubleBinding acc = new SimpleDoubleProperty(0).add(0);

public void append(ObservableDoubleValue delta){
    // . . .
    acc = acc.add(delta);
}

Answer 1

您可以使用Bindings类（createDoubleBinding）中的实用程序创建error: Grunt :: (node) warning: possible EventEmitter memory leak detected. 11 change listeners added. Use emitter.setMaxListeners() to increase limit. error: Grunt :: Trace at StatWatcher.addListener (events.js:239:17) at Object.fs.watchFile (fs.js:1424:8) at Gaze._pollFile (/home/ketys/batn/node_modules/gaze/lib/gaze.js:329:10) at /home/ketys/batn/node_modules/gaze/lib/gaze.js:411:12 at Array.forEach (native) at /home/ketys/batn/node_modules/gaze/lib/gaze.js:409:11 at iterate (/home/ketys/batn/node_modules/gaze/lib/helper.js:52:5) at /home/ketys/batn/node_modules/gaze/lib/helper.js:61:11 at /home/ketys/batn/node_modules/gaze/lib/gaze.js:420:5 at iterate (/home/ketys/batn/node_modules/gaze/lib/helper.js:52:5)：

DoubleBinding

参数是一个返回绑定值的函数。在这种情况下，假设Java 8，该函数返回常量值0.请注意，此private DoubleBinding acc = Bindings.createDoubleBinding(() -> 0d);不会绑定到任何DoubleBinding。

使用常量值创建DoubleBinding

1 个答案: