这是我的问题：我有一些单身，想拉链。但我只希望在Completable完成后调用zip函数。另外，我想同时订阅所有单曲和Completable。 （所以没有completable.andThen(Single.zip(...)）
以下是我现在正在做的一个例子：
Single<T1> s1 = …;
Single<T2> s2 = …;
Single<T3> s3 = …;
Completable c = …;
Single.zip(s1, s2, s3, c.andThen(Single.just("")), (a, b, c, ignore) -> {
// All singles have emitted an item and c is completed
…
})
有更好的方法吗？
答案 0 :(得分：11)
从import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;
public class TestLine {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new TestLine().start();
}
});
}
private static void start() {
JFrame frame = new JFrame();
frame.setContentPane(new CarthPanel());
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
private static class CarthPanel extends JComponent {
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D gg = (Graphics2D) g;
int w = gg.getClipBounds().width;
int h = gg.getClipBounds().height;
System.out.println("(w,h)=(" + w + "," + h + ")");
gg.translate(w - 1, 0); // <<< when uncommenting both lines, mirroring applies
gg.scale(-1.0, 1.0); //
paintTest(gg, w, h);
}
private static void paintTest(Graphics2D g, int w, int h) {
// black background
g.setColor(Color.black);
g.fillRect(0, 0, w, h);
// colored corners
g.setColor(Color.RED);
g.drawLine(0, 0, 10, 0);
g.drawLine(0, 0, 0, 10);
g.setColor(Color.RED);
g.drawLine(0, 199, 10, 199);
g.drawLine(0, 199, 0, 189);
g.setColor(Color.CYAN);
g.drawLine(189, 0, 199, 0);
g.drawLine(199, 0, 199, 10);
g.setColor(Color.CYAN);
g.drawLine(189, 199, 199, 199);
g.drawLine(199, 199, 199, 189);
// yellow squares
g.setColor(Color.yellow);
g.drawRect(3, 3, 10, 10);
g.fillRect(186, 3, 11, 11);
g.fillRect(3, 186, 11, 11);
g.drawRect(186, 186, 10, 10);
String chars = "ABC";
g.setFont(Font.decode("Arial 72"));
Rectangle2D rect = g.getFontMetrics().getStringBounds(chars, g);
g.drawString(chars, (int) (200 - rect.getWidth()) / 2, (int) (200 - rect.getHeight()));
}
}
}
转换为toSingleDefault时，您可以使用Completable：
Single