2.
public static void main(String[] args) {
ReentrantLock myLock = new ReentrantLock();
withLock(myLock, ()->{
System.out.println("running");
});
}
public static void withLock(ReentrantLock myLock, Runnable runnable) {
myLock.lock();
try {
runnable.run();
} finally {
myLock.unlock();
}
}
5.
public static void main(String[] args) {
Image image = new Image("C:/Users/Administrator/Desktop/1.jpg");
Image newImage = transform(image, (x, y, colorAtXY) -> {
if(x<10||x>image.getWidth()-10||y<10||y>image.getHeight()-10) {
return Color.GREY;
} else {
return colorAtXY;
}
});
}
public static Image transform(Image in, ColorTransformer cf) {
int width = (int) in.getWidth();
int height = (int) in.getHeight();
WritableImage out = new WritableImage(width, height);
for(int x = 0; x < width; x++) {
for(int y = 0; y < height; y++) {
out.getPixelWriter().setColor(x, y, cf.apply(x, y, in.getPixelReader().getColor(x, y)));
}
}
return out;
}
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