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58 changes: 58 additions & 0 deletionsObjectAndClass.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| package oopsConcepts; | ||
| public class ObjectAndClass { | ||
| int employeeId; | ||
| String employeeName; | ||
| public ObjectAndClass() { | ||
| super(); | ||
| } | ||
| public ObjectAndClass(int employeeId, String employeeName) { | ||
| super(); | ||
| this.employeeId = employeeId; | ||
| this.employeeName = employeeName; | ||
| } | ||
| public void methodInitializer(int id, String name) { | ||
| employeeId = id; | ||
| employeeName = name; | ||
| } | ||
| public void methodForAnonymousObject() { | ||
| System.out.println("Employee ID: "+employeeId+" is updated successfully."); | ||
| } | ||
| public void display() { | ||
| System.out.println("Employee ID: "+employeeId+" and Employee Name: "+employeeName+" is updated successfully."); | ||
| } | ||
| public static void main(String[] args) { | ||
| ObjectAndClass oc = new ObjectAndClass(); | ||
| //through variable reference | ||
| oc.employeeId = 1608; | ||
| oc.employeeName = "Ismail"; | ||
| oc.display(); | ||
| //through method reference | ||
| oc.methodInitializer(1608, "Faris"); | ||
| oc.display(); | ||
| //through constructor reference | ||
| ObjectAndClass oac = new ObjectAndClass(1608, "Ismail Faris"); | ||
| oac.display(); | ||
| //anonymous object | ||
| new ObjectAndClass(1608, "Faris").methodForAnonymousObject(); | ||
| } | ||
| } |
135 changes: 135 additions & 0 deletionsTypesOfInheritance.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| package oopsConcepts; | ||
| //IS-A Relationship | ||
| //Single Inheritance | ||
| //class ParentClass{ | ||
| //int i = 5; | ||
| //int j = 10; | ||
| //void sum() { | ||
| //int total = i + j; | ||
| //System.out.println(total); | ||
| //} | ||
| //} | ||
| // | ||
| //class SubClass extends ParentClass{ | ||
| //void display() { | ||
| //System.out.println("problem solved"); | ||
| //} | ||
| //} | ||
| // | ||
| //public class TypesOfInheritance { | ||
| // | ||
| //public static void main(String[] args) { | ||
| // | ||
| //SubClass ps = new SubClass(); | ||
| //ps.sum(); | ||
| //ps.display(); | ||
| //} | ||
| // | ||
| //} | ||
| //Multi Level Inheritance with method overloading and overriding concept | ||
| //class ParentClass{ | ||
| //int i = 5; | ||
| //int j = 10; | ||
| //void sum() { | ||
| //int total = i + j; | ||
| //System.out.println(total); | ||
| //} | ||
| //} | ||
| // | ||
| //class SubClassOne extends ParentClass{ | ||
| //void display() { | ||
| //System.out.println("From One"); | ||
| //} | ||
| //void display(int k) { | ||
| //i = k; | ||
| //} | ||
| //} | ||
| // | ||
| //class SubClassTwo extends SubClassOne{ | ||
| //void display() { | ||
| //super.display(); | ||
| //super.display(5); | ||
| //System.out.println("From Two"); | ||
| //} | ||
| //} | ||
| // | ||
| //public class TypesOfInheritance { | ||
| // | ||
| //public static void main(String[] args) { | ||
| // | ||
| //SubClassTwo ps = new SubClassTwo(); | ||
| //ps.sum(); | ||
| //ps.display(); | ||
| //} | ||
| // | ||
| //} | ||
| //Hierarchical Inheritance | ||
| //class ParentClass{ | ||
| //int i = 5; | ||
| //int j = 10; | ||
| //void sum() { | ||
| //int total = i + j; | ||
| //System.out.println(total); | ||
| //} | ||
| //} | ||
| // | ||
| //class SubClassOne extends ParentClass{ | ||
| //void display() { | ||
| //System.out.println("From One"); | ||
| //} | ||
| //} | ||
| // | ||
| //class SubClassTwo extends ParentClass{ | ||
| //void display() { | ||
| //System.out.println("From Two"); | ||
| //} | ||
| //} | ||
| // | ||
| //public class TypesOfInheritance { | ||
| // | ||
| //public static void main(String[] args) { | ||
| // | ||
| //SubClassOne so = new SubClassOne(); | ||
| //so.sum(); | ||
| //so.display(); | ||
| // | ||
| //SubClassTwo st = new SubClassTwo(); | ||
| //st.sum(); | ||
| //st.display(); | ||
| //} | ||
| //} | ||
| //HAS-A Relationship | ||
| class ParentClass{ | ||
| int i = 5; | ||
| int j = 10; | ||
| public int sum() { | ||
| int total = i + j; | ||
| return total; | ||
| } | ||
| } | ||
| class SubClassOne{ | ||
| ParentClass pc; | ||
| public void display() { | ||
| pc = new ParentClass(); | ||
| int k = pc.sum(); | ||
| int multiply = k * k; | ||
| System.out.println(multiply); | ||
| } | ||
| } | ||
| public class TypesOfInheritance { | ||
| public static void main(String[] args) { | ||
| new SubClassOne().display(); | ||
| } | ||
| } |
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