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Update Javaa
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‎Javaa‎

Lines changed: 139 additions & 192 deletions
Original file line numberDiff line numberDiff line change
@@ -1,196 +1,143 @@
1-
static,public class MyClass {
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static int classVariable = 0;
3-
int instanceVariable;
41

5-
public static void classMethod() {
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System.out.println("This is a static method.");
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}
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static {
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System.out.println("Static initialization block executed.");
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classVariable = 10;
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}
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public MyClass(int instanceVariable) {
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this.instanceVariable = instanceVariable;
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}
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public static void main(String[] args) {
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MyClass.classMethod();
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MyClass obj1 = new MyClass(5);
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MyClass obj2 = new MyClass(15);
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System.out.println("obj1.classVariable: " + obj1.classVariable);
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obj1.classVariable = 20;
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System.out.println("obj2.classVariable: " + obj2.classVariable);
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}
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}
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final,public class MyClass {
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final int constantValue = 10;
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public final void myMethod() {
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System.out.println("This is a final method.");
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}
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}
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final class FinalClass { }
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class SubClass extends MyClass {
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// public void myMethod() { } // Error: Cannot override final method
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}
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public class Main {
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public static void main(String[] args) {
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MyClass obj = new MyClass();
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System.out.println(obj.constantValue);
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}
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}
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abstract,abstract class MyAbstractClass {
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public abstract void myAbstractMethod();
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public void myConcreteMethod() {
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System.out.println("This is a concrete method.");
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}
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}
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class MySubClass extends MyAbstractClass {
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@Override
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public void myAbstractMethod() {
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System.out.println("Implementation of myAbstractMethod.");
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}
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}
60-
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public class Main {
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public static void main(String[] args) {
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MySubClass obj = new MySubClass();
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obj.myAbstractMethod();
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obj.myConcreteMethod();
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}
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}
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synchronized,public class Counter {
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private int count = 0;
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public synchronized void increment() {
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count++;
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}
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public int getCount() {
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return count;
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}
78-
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public static void main(String[] args) throws InterruptedException {
80-
Counter counter = new Counter();
81-
Runnable task = () -> {
82-
for (int i = 0; i < 1000; i++) {
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counter.increment();
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}
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};
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Thread t1 = new Thread(task);
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Thread t2 = new Thread(task);
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t1.start();
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t2.start();
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t1.join();
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t2.join();
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System.out.println("Final count: " + counter.getCount());
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}
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}
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volatile,public class Worker {
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private volatile boolean running = true;
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public void start() {
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new Thread(() -> {
101-
while (running) {
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System.out.println("Worker is running...");
103-
try {
104-
Thread.sleep(500);
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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System.out.println("Worker has stopped.");
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}).start();
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}
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public void stop() {
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running = false;
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}
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public static void main(String[] args) throws InterruptedException {
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Worker worker = new Worker();
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worker.start();
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Thread.sleep(3000);
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worker.stop();
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Thread.sleep(1000);
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}
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}
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transient,import java.io.*;
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public class MyClass implements Serializable {
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private String regularData;
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private transient String sensitiveData;
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public MyClass(String regularData, String sensitiveData) {
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this.regularData = regularData;
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this.sensitiveData = sensitiveData;
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}
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public static void main(String[] args) {
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MyClass
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transient,import java.io.*;
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public class MyClass implements Serializable {
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private String regularData;
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private transient String sensitiveData;
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public MyClass(String regularData, String sensitiveData) {
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this.regularData = regularData;
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this.sensitiveData = sensitiveData;
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}
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public static void main(String[] args) {
150-
MyClass obj = new MyClass("This will be saved", "This will NOT be saved");
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// Serialization
153-
try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("data.ser"))) {
154-
oos.writeObject(obj);
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System.out.println("Object serialized.");
156-
} catch (IOException e) {
157-
e.printStackTrace();
2+
"properties": {
3+
"id": {
4+
"description": "Lowercase, underscore-separated, unique identifier.",
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"pattern": "^[a-z0-9_]+$",
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"title": "Id",
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"type": "string"
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},
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"name": {
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"description": "Human-readable format, title case with acronyms.",
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"title": "Name",
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"type": "string"
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},
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"full_form": {
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"description": "Full acronym expansion.",
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"title": "Full Form",
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"type": "string"
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},
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"category": {
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"description": "Lowercase, underscore-separated.",
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"pattern": "^[a-z0-9_]+$",
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"title": "Category",
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"type": "string"
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},
25+
"layer": {
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"description": "Lowercase, underscore-separated.",
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"pattern": "^[a-z0-9_]+$",
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"title": "Layer",
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"type": "string"
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},
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"system": {
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"description": "System environment or domain.",
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"title": "System",
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"type": "string"
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},
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"utility": {
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"description": "Lowercase values; multiple roles supported.",
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"items": {
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"type": "string"
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},
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"title": "Utility",
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"type": "array"
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},
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"description": {
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"anyOf": [
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{
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"type": "string"
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},
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{
50+
"type": "null"
15851
}
159-
160-
// Deserialization
161-
try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream("data.ser"))) {
162-
MyClass loadedObj = (MyClass) ois.readObject();
163-
System.out.println("Object deserialized.");
164-
System.out.println("regularData: " + loadedObj.regularData);
165-
System.out.println("sensitiveData: " + loadedObj.sensitiveData); // Will be null
166-
} catch (IOException | ClassNotFoundException e) {
167-
e.printStackTrace();
52+
],
53+
"default": null,
54+
"description": "Optional description of the node.",
55+
"title": "Description"
56+
},
57+
"connections": {
58+
"anyOf": [
59+
{
60+
"items": {
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"type": "string"
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},
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"type": "array"
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},
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{
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"type": "null"
16867
}
169-
}
170-
}
171-
native,public class NativeExample {
172-
// Native method declaration (no implementation in Java)
173-
public native void myNativeMethod();
174-
175-
// Load the native library (e.g., mylibrary.so or mylibrary.dll)
176-
static {
177-
System.loadLibrary("mylibrary"); // Library name without prefix or extension
178-
}
179-
180-
public static void main(String[] args) {
181-
NativeExample obj = new NativeExample();
182-
obj.myNativeMethod(); // Call the native method
183-
}
184-
}
185-
strictfp,public class StrictFPExample {
186-
// strictfp method
187-
public strictfp double calculate(double a, double b) {
188-
return a / b;
189-
}
190-
191-
public static void main(String[] args) {
192-
StrictFPExample obj = new StrictFPExample();
193-
double result = obj.calculate(10.0, 3.0);
194-
System.out.println("Result: " + result);
195-
}
68+
],
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"default": null,
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"description": "Optional list of connected node IDs.",
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"title": "Connections"
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},
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"domain": {
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"anyOf": [
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{
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"type": "string"
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},
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{
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"type": "null"
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}
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],
82+
"default": null,
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"description": "Optional domain the node belongs to.",
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"title": "Domain"
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},
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"thresholds": {
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"anyOf": [
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{
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"additionalProperties": {
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"type": "number"
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},
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"type": "object"
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},
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{
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"type": "null"
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}
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],
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"default": null,
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"description": "Optional thresholds for triggering actions.",
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"title": "Thresholds"
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},
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"status": {
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"anyOf": [
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{
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"type": "string"
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},
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{
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"type": "null"
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}
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],
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"default": null,
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"description": "Optional status indicator, e.g., active, deprecated.",
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"title": "Status"
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},
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"tags": {
116+
"anyOf": [
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{
118+
"items": {
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"type": "string"
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},
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"type": "array"
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},
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{
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"type": "null"
125+
}
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],
127+
"default": null,
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"description": "Optional list of tags or keywords.",
129+
"title": "Tags"
130+
}
131+
},
132+
"required": [
133+
"id",
134+
"name",
135+
"full_form",
136+
"category",
137+
"layer",
138+
"system",
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"utility"
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],
141+
"title": "Node",
142+
"type": "object"
196143
}

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