Implement Java Assignment #15 and more

java/{code/ParentWithTwoChildren.java, output/ParentWithTwoChildren.typ, text/ParentWithTwoChildren.typ}: Code, output and assignment text for Java assignment #15
java/state.sql: Update for Java assignment #15
java/template.typ: Allow for long program description to be left aligned
and justified, instead of centered
java/tobedone: Update to show assignment numbers (implicitly `rowid`)

1 files changed, 28 insertions, 0 deletions

diff --git a/java/text/ParentWithTwoChildren.typ b/java/text/ParentWithTwoChildren.typ
new file mode 100644
index 0000000..e307cc8
--- /dev/null
+++ b/java/text/ParentWithTwoChildren.typ
@@ -0,0 +1,28 @@
+#import "/template.typ": *
+#show: A => apply(A)
+#set raw(lang: "java-new")
+#set par(leading: 0.5em)
+
+#assignment(15, block: true)[
+  Write a program to create a class `Parent` having instance variables `id`, `name` and `address`; a class `ChildOne` having instance variables `id`, `name`, `address` and `marks`; another class `ChildTwo` with instance variables `id`, `name`, `address`, `qualification` and `salary`. Design the program using `super` call with proper parameters within each class and define your own method to display values of the member variable and use an object of each class from `main()` to display their properties.
+]
+
+#scos("ParentWithTwoChildren")
+
+=== Discussion
+
+#skind[Classes, interfaces and methods used from Java standard library]
+
+- `java.lang.Object` class:
+  - `Class<?> getClass()`: Returns the `Class` object representing the class of the object.
+- `java.lang.Class<T>` class:
+  - `String getSimpleName()`: Returns the simple name of the underlying class as a string.
+
+#skind[Classes and methods implemented in the program]
+
+- `Parent`: Base class with `id`, `name`, and `address`, displaying all information dynamically using the `display` method.
+- `ChildOne`: Inherits from `Parent`, adds `marks`, and displays them after parent data using the `display` method.
+- `ChildTwo`: Inherits from `Parent`, adds `qualification` and `salary`, and displays them after parent data using the `display` method.
+- `Main`: Creates and showcases `Parent`, `ChildOne`, and `ChildTwo` object details using the `main` method.
+
+#signature()