Java Button.getButtons方法代码示例

import lejos.hardware.Button; //导入方法依赖的package包/类
public void run() {
    while (true) {
        if (Button.getButtons() == Keys.ID_ESCAPE) {
            try {
                robot.stop();
            } catch (IOException e) {
                // this won't happen
            }
        }
    }
}
 

import lejos.hardware.Button; //导入方法依赖的package包/类
/**
 * Obtain a menu item selection
 * Allow the user to make a selection from the specified menu item. If a
 * power off timeout has been specified and no choice is made within this
 * time power off the NXT.
 *
 * @param menu Menu to display.
 * @param cur Initial item to select.
 * @return Selected item or < 0 for escape etc.
 */
@SuppressWarnings("deprecation")
private int getSelection(GraphicMenu menu, int cur) {
    int selection;

    curMenu = menu;

    // If the menu is interrupted by another thread, redisplay
    do {
        selection = menu.select(cur, this.timeout * 60000);

        while ( suspend ) {
            if ( program != null && !echoIn.isAlive() && !echoErr.isAlive() ) {
                stopProgram();
                this.ind.resume();
                break;
            }
            int b = Button.getButtons();
            if ( b == 6 ) {
                if ( program != null ) {
                    stopProgram();
                }
                this.ind.resume();
                break;
            }
            Delay.msDelay(200);
        }
    } while ( selection == -2 );

    if ( selection == -3 ) {
        shutdown();
    }

    return selection;
}
 

import lejos.hardware.Button; //导入方法依赖的package包/类
/**
 * Execute a program and display its output to System.out and error stream to System.err
 */
private static void exec(File jar, String command, String directory) {
    try {
        if ( jar != null ) {
            String jarName = jar.getName();
            programName = jarName.substring(0, jarName.length() - 4); // Remove .jar
        }
        lcd.clear();
        lcd.refresh();
        lcd.setAutoRefresh(false);

        drawLaunchScreen();

        program = new ProcessBuilder(command.split(" ")).directory(new File(directory)).start();
        BufferedReader input = new BufferedReader(new InputStreamReader(program.getInputStream()));
        BufferedReader err = new BufferedReader(new InputStreamReader(program.getErrorStream()));

        echoIn = new EchoThread(jar.getPath().replace(".jar", ".out"), input, System.out);
        echoErr = new EchoThread(jar.getPath().replace(".jar", ".err"), err, System.err);

        echoIn.start();
        echoErr.start();

        System.out.println("Executing " + command + " in " + directory);

        while ( true ) {
            int b = Button.getButtons();
            if ( b == 6 ) {
                System.out.println("Killing the process");
                program.destroy();
                // reset motors after program is aborted
                resetMotors();
                break;
            }
            if ( !echoIn.isAlive() && !echoErr.isAlive() ) {
                break;
            }
            Delay.msDelay(200);
        }
        System.out.println("Waiting for process to die");
        ;
        program.waitFor();
        System.out.println("Program finished");
    } catch ( Exception e ) {
        System.err.println("Failed to execute program: " + e);
    } finally {
        // Turn the LED off, in case left on
        Button.LEDPattern(0);
        lcd.setAutoRefresh(true);
        lcd.clear();
        lcd.refresh();
        program = null;
    }
}