hello/java/samples/swing/dev_j2022_2/Dev_j2022_2.java

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package dev_j2022_2;

/**
 *
 * @author denis
 */
public class Dev_j2022_2 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Device[] devices = new Device[5];
        String line = " Hello";
        devices[0]=new ElectronicDevice();
        devices[1]=new MechanicalDevice();
        devices[2]=new ElectronicDevice();
        devices[3]=new MechanicalDevice();
        devices[4]=new Device();
        
        for(int i=0 ; i<devices.length ; i++){
            devices[i].print();
        }
        ElectronicDevice e1 = new ElectronicDevice();
        Device e2 = new ElectronicDevice();
        ((ElectronicDevice)e2).setPower(15);
    }
    
}