Android studio支持将纯Java模块编写为库.在这样的库中使用平台jdk.但是,文档quickview的javadoc url(带Ctrl+ Q)是错误的.我的情况是它在ConcurrentLinkedQueue.take()的文档中声明的代码片段
Following external urls were checked: http://docs.oracle.com/javafx/2/api/java/util/concurrent/LinkedBlockingQueue.html#take() http://docs.oracle.com/javafx/2/api/java/util/concurrent/LinkedBlockingQueue.html#take -- The documentation for this element is not found. Please add all the needed paths to API docs in Project Settings.
IDE从哪里获取javafx网址?如何将该URL更改为合理的默认值(我在项目设置中找不到任何内容)?
我需要将BufferedImages(RGB,无伪影)转换为字节数组进行发送.在进行单元测试时,我偶然发现了一个问题,无论是BufferedImage我的期望还是我的代码.
甲BufferedImage转换再次相同的字节数组后转换为字节阵列和回收率.我认为它是相同的图像.但是,如果我将原始图像和看似相同的背面转换图像转换为灰度图像,这会给我完全不同的图像(不仅仅是一个字节,真的不同!).显然,我希望灰度图像是相同的,因为源是相同的.任何人都可以开导我吗?我有点不对劲吗?
我有一个完整的剥离示例.
import java.awt.BasicStroke;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.color.ColorSpace;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.ColorConvertOp;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Random;
import javax.imageio.ImageIO;
public class GreyImageProblem {
private static Random random = new Random();
private static int randInt(int from, int to) {
return random.nextInt(to-from+1)+from;
}
private static java.awt.Color randColor() {
return new java.awt.Color(randInt(0,256*256*256));
}
// a random image with different RGB colors
public static BufferedImage genImage() {
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