java/Demo6.java at main · tumansutradhar/java · GitHub

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// class Student {
//     String name;
//     int rollno;
//     int marks;
// }

public class Demo6 {
    public static void main(String[] args) {
        // 20. Array Of Objects In Java
        // int newArray[] = new int[4];

        // newArray[0] = 5;
        // newArray[1] = 74;
        // newArray[2] = 65;
        // newArray[3] = 85;

        // for (int i = 0; i < newArray.length; i++) {
        // System.out.println(newArray[i]);
        // }

        // Student a = new Student();
        // a.name = "Tuman";
        // a.rollno = 20223045;
        // a.marks = 787;

        // Student b = new Student();
        // b.name = "Bishal";
        // b.rollno = 45;
        // b.marks = 78;

        // Student c = new Student();
        // c.name = "Bunny";
        // c.rollno = 01;
        // c.marks = 98;

        // System.out.println(a);
        // System.out.println(b);
        // System.out.println(c);

        // Student students[] = new Student[3];
        // students[0] = a;
        // students[1] = b;
        // students[2] = c;

        // for (int i = 0; i < students.length; i++) {
        // System.out.println(students[i].name + ": " + students[i].rollno);
        // }

        // =============================================

        // =============================================

        // 21. Enhanced For Loop In Java
        // int a[] = new int[4];

        // a[0] = 56;
        // a[1] = 89;
        // a[2] = 97;
        // a[3] = 79;

        // for (int i : a) {
        // System.out.print(i + " ");
        // }
        // System.out.println();

        // =============================================

        // =============================================

        // 22. String In Java
        // String str = new String("Tuman");

        // System.out.println(str);
        // System.out.println(str.charAt(3));
        // System.out.println(str.hashCode());
        // System.out.println(str.concat(" Sutradhar"));

        // =============================================

        // =============================================

        // 23. Mutable(Change) VS Immutable(Unchanged) String In Java
        // String name = "Tuman";
        // name = name + " Sutradhar";

        // System.out.println(name);
    }
}