48 lines
1.3 KiB
Java
48 lines
1.3 KiB
Java
/*
|
|
* File: TimesSquare.java
|
|
* ----------------------
|
|
* This program displays the text of the string HEADLINE on the
|
|
* screen in an animated way that moves it across the display
|
|
* from left to right.
|
|
*/
|
|
|
|
import acm.graphics.*;
|
|
import acm.program.*;
|
|
|
|
public class TimesSquare extends GraphicsProgram {
|
|
|
|
/** Runs the program */
|
|
public void run() {
|
|
GLabel label = new GLabel(HEADLINE);
|
|
label.setFont("Serif-72");
|
|
add(label, getWidth(), (getHeight() + label.getAscent()) / 2);
|
|
while (label.getX() + label.getWidth() > 0) {
|
|
label.move(-DELTA_X, 0);
|
|
pause(PAUSE_TIME);
|
|
}
|
|
}
|
|
|
|
/* The number of pixels to shift the label on each cycle */
|
|
private static final int DELTA_X = 2;
|
|
|
|
/* The number of milliseconds to pause on each cycle */
|
|
private static final int PAUSE_TIME = 20;
|
|
|
|
/* The string to use as the value of the label */
|
|
private static final String HEADLINE =
|
|
"When in the course of human events it becomes necessary " +
|
|
"for one people to dissolve the political bands which " +
|
|
"connected them with another . . .";
|
|
|
|
/* Make the graphics window long and narrow */
|
|
public static final int APPLICATION_WIDTH = 700;
|
|
public static final int APPLICATION_HEIGHT = 100;
|
|
|
|
/* Standard Java entry point */
|
|
/* This method can be eliminated in most Java environments */
|
|
public static void main(String[] args) {
|
|
new TimesSquare().start(args);
|
|
}
|
|
}
|
|
|