B8 Day 5 class and instance

package mattroseb8wk1;

public class Day05C {
    static String txt1 = "high ground"; // class variable
    // hindi nagagamit sa ibang file

    public static void main(String[] args) {
        System.out.println("using class variables");
        //ganito gamitin ang class variable
        System.out.println(txt1);
    }
}

//------ Ibang File na Ito -------------------------------------------------

package mattroseb8wk1;

public class Day05D {
    public static void main(String[] args) {
        System.out.println("using instance variables");
        // ang instance variable, need ka pa gumawa ng object
        // className objectName = new className();
        SampleVariables callSample = new SampleVariables();

        System.out.println(callSample.num1);
        System.out.println(callSample.txt1);
        callSample.txt1 = "September 16, 2022";
        System.out.println(callSample.txt1);
    }
}

// pwede ka magkaroon ng dalwang class o mahigit pa
// PERO DAPAT isa lang sa kanila ang may public
class SampleVariables {
    // ang mga instance variables, mga variable na walang static sa unahan
    int num1 = 20;
    int num2 = 30;
    int num3 = 40;
    String txt1 = "Matt Rose";
    String txt2 = "Tesda";
}