From 72b75a3300080e3c6a157953cb784913ab8e6a5b Mon Sep 17 00:00:00 2001
From: Dennis Ryumin <d.ryumin@sigma-it.ru>
Date: Sun, 13 Feb 2022 15:31:46 +0300
Subject: [PATCH] generic interfaces examle

---
 .gitignore                                 | 45 ++++++++++++++++++++++
 src/com/katapios/Main.java                 | 18 +++++++++
 src/com/katapios/ModifierInterface.java    |  7 ++++
 src/com/katapios/NumberGeneratorClass.java | 17 ++++++++
 4 files changed, 87 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 src/com/katapios/Main.java
 create mode 100644 src/com/katapios/ModifierInterface.java
 create mode 100644 src/com/katapios/NumberGeneratorClass.java

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a612090
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,45 @@
+*.java.hsp
+*.sonarj
+*.sw*
+.DS_Store
+.settings
+.springBeans
+bin
+build.sh
+integration-repo
+ivy-cache
+jxl.log
+jmx.log
+derby.log
+spring-test/test-output/
+.gradle
+argfile*
+activemq-data/
+
+
+/build
+buildSrc/build
+/spring-*/build
+/spring-core/kotlin-coroutines/build
+/framework-bom/build
+/integration-tests/build
+/src/asciidoc/build
+target/
+
+# Eclipse artifacts, including WTP generated manifests
+.classpath
+.project
+spring-*/src/main/java/META-INF/MANIFEST.MF
+
+# IDEA artifacts and output dirs
+*.iml
+*.ipr
+*.iws
+.idea
+out
+test-output
+atlassian-ide-plugin.xml
+.gradletasknamecache
+
+# VS Code
+.vscode/
\ No newline at end of file
diff --git a/src/com/katapios/Main.java b/src/com/katapios/Main.java
new file mode 100644
index 0000000..1ce6ac4
--- /dev/null
+++ b/src/com/katapios/Main.java
@@ -0,0 +1,18 @@
+package com.katapios;
+
+public class Main {
+
+    public static void main(String[] args) {
+
+        NumberGeneratorClass numberGeneratorClass = new NumberGeneratorClass();
+
+        ModifierInterface<Integer> a = numberGeneratorClass::add;
+        ModifierInterface<Double> b = numberGeneratorClass::add;
+        ModifierInterface<String> c = numberGeneratorClass::add;
+
+        System.out.println(numberGeneratorClass.add(2));
+        System.out.println(numberGeneratorClass.add(2.0));
+        System.out.println(numberGeneratorClass.add("2"));
+
+    }
+}
diff --git a/src/com/katapios/ModifierInterface.java b/src/com/katapios/ModifierInterface.java
new file mode 100644
index 0000000..3d87ccc
--- /dev/null
+++ b/src/com/katapios/ModifierInterface.java
@@ -0,0 +1,7 @@
+package com.katapios;
+
+public interface ModifierInterface<T> {
+
+    public T change(T obj);
+
+}
diff --git a/src/com/katapios/NumberGeneratorClass.java b/src/com/katapios/NumberGeneratorClass.java
new file mode 100644
index 0000000..7677b78
--- /dev/null
+++ b/src/com/katapios/NumberGeneratorClass.java
@@ -0,0 +1,17 @@
+package com.katapios;
+
+public class NumberGeneratorClass {
+
+    public Integer add(Integer n){
+        return n + 10;
+    }
+
+    public Double add(Double n){
+        return n + 10.0;
+    }
+
+    public String add(String n){
+        return "String " + n;
+    }
+
+}