Merge pull request #17 from yashpatel08/main

Add files via upload

Author: kaal-coder

A.java

@@ -0,0 +1,20 @@
+        // private constructor//
+
+class A 
+{
+    int a; double b; String c;
+   private A()
+    {
+        a=15;
+        b=15.45;
+        c="yash";
+        System.out.println(a+" "+b+" "+c);
+    }
+
+public static void main(String[] args) //if we can write this main method in other class (like class b)then it eill not access the value or it will show error
+{
+        A r=new A();
+       
+}   
+
+}

B.java

@@ -0,0 +1,24 @@
+//default constructor
+class A
+{
+    int a; String b; boolean c;
+    A()// if we comment out this constructor then all value will be given by compiler and it will be default value because it will create a default constructor
+    {
+        a=100; b="yash"; c=true;
+    }
+    void Disp()
+    {
+        System.out.println(a+" "+b+" "+c);
+    }
+}
+class B
+{
+    public static void main(String[] args) {
+       
+        A r=new A();
+         
+    r.Disp();
+
+    }
+    
+}

Customer.java

@@ -0,0 +1,10 @@
+
+public class Customer {
+
+    public void stop() {
+    }
+
+    public void start() {
+    }
+
+}

array.java

@@ -0,0 +1,18 @@
+public class array {
+
+    public static void main(String[] args) {
+        
+        int a[]={10,20,30,40,50};
+        System.out.println(a[2]);
+        System.out.println(a[4]);
+
+        System.out.print("by for each loop ");//example of for each loop for printing array
+
+        for (int b : a) {
+            
+            System.out.print(b+" ");
+
+        }
+    }
+    
+}

array2.java

@@ -0,0 +1,23 @@
+import java.util.Scanner;
+
+public class array2 {
+
+    public static void main(String[] args) {
+
+        int a[]=new int[5];
+        System.out.print("enter the array elements");
+        Scanner p=new Scanner(System.in);
+        for (int i = 0; i < 5; i++) {
+            
+            a[i]=p.nextInt();
+        }
+        System.out.print("\n array elements are\n");
+        for (int b : a) {
+            
+            System.out.println(b+" ");
+
+        }
+        
+    }
+    
+}

constructor_ex.java

@@ -0,0 +1,22 @@
+// constructor is use initialise the variable or value of property it is represent by class name e.g---constructor_ex
+class constructor_ex
+{
+    int a;  String name;
+    constructor_ex()    // if we comment this constructor part then program will also run because it will create default constructor 
+    {
+        a=0; name=null ;
+
+    }
+    void show()
+    {
+        System.out.println(a+" "+name);
+    }
+}
+class b
+{
+    public static void main(String[] args) 
+    {
+        constructor_ex ref=new constructor_ex();
+        ref.show();    
+    }
+}

copy_constructor.java

@@ -0,0 +1,32 @@
+//here we are copy from simple constructor
+class d {
+
+    int b;
+    String c;
+
+    d() //this is constructor 
+    {
+        b = 200;
+        c = "yash";
+        System.out.println(b + " " + c);
+    }
+
+    d(d ref) // this is copy constructor by using this we can see that value of a constructor is copy by passing reference as parameter
+    {
+        b = ref.b;
+        c = ref.c;
+        System.out.println(b + " " + c);
+    }
+
+}
+
+class copy_constructor {
+
+    public static void main(String[] args) {
+
+        d r = new d();
+        d r2 = new d(r);
+
+    }
+
+}

copy_constructor2.java

@@ -0,0 +1,31 @@
+// here we copy parameterised constructor
+class e
+{
+    int x,y;
+
+    e(int u,int v)//parameterised
+    {
+        x=u;
+        y=v;
+        
+    }
+    e(e ref) // this is copy constructor by using this we can see that value of a constructor is copy by passing reference as parameter
+    {
+      u = ref.u;
+      v = ref.v;
+        System.out.println(u + " " + v);
+    }
+    void dip()
+    {
+        System.out.println(x+ " " +y);
+    }
+   
+}
+class copy_constructor2 {
+
+public static void main(String[] args)
+ {
+    copy_constructor2 r=new copy_constructor2();  
+    r.dip();
+    
+}

example_class.java

@@ -0,0 +1,26 @@
+public class example_class {
+
+    
+        int age=19;
+        int weight=52;
+        String colour="light";
+        void eat()
+        {
+            System.out.println("i'm eating");
+        }    
+        void sleep()
+        {
+            System.out.println("i'm sleeping");
+        }
+
+        public static void main(String[] args)
+        {
+        example_class P=new example_class();
+            System.out.println(P.age);
+            System.out.println(P.weight);
+            System.out.println(P.colour);  
+
+            P.eat();    P.sleep();
+        }
+    
+}

first.java

@@ -0,0 +1,8 @@
+public class first {
+    public static void main(String[] args) {
+        
+        System.out.print("java begins");
+
+    }
+    
+}