Reflections demo has been added

Author: sathishmepco

Reflections/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

Reflections/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Reflections</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

Reflections/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.7
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.7

Reflections/bin/com/cdac/Account.class

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+package com.cdac;
+
+public class Account {
+	
+	private int balance;
+	public Account() {
+	}
+	
+	public Account(int balance) {
+		this.balance = balance;
+	}
+	
+	public int getBalance() {
+		return balance;
+	}
+
+	public void setBalance(int balance) {
+		this.balance = balance;
+	}
+}

Reflections/bin/com/cdac/ReflectionsDemo.class

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+package com.cdac;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+public class ReflectionsDemo {
+
+	public static void main(String[] args) throws ClassNotFoundException, NoSuchFieldException, SecurityException,
+			IllegalArgumentException, IllegalAccessException, InvocationTargetException {
+
+		Class c = String.class;
+		Method[] methods = c.getMethods();
+
+		System.out.println("Methods in String class :: ");
+		for (Method m : methods)
+			System.out.println(m.getName());
+
+		Account account = new Account(5000);
+		Class accountClass = Class.forName("com.cdac.reflection.Account");
+		methods = accountClass.getMethods();
+		System.out.println("Methods in Account class");
+		for (Method m : methods) {
+			System.out.println(m.getName());
+			if (m.getName().contains("set")) {
+				m.invoke(account, 30000);
+			}
+		}
+		System.out.println("Account Balance :: " + account.getBalance());
+
+		// when field is public
+		/*
+		 * Field f = accountClass.getField("balance"); f.setInt(account, 10000);
+		 * System.out.println(account.getBalance());
+		 */
+
+		// accessing the private fields
+		Field privateField = accountClass.getDeclaredField("balance");
+		privateField.setAccessible(true);
+		privateField.set(account, 20000);
+		System.out.println("New Balance is :: " + account.getBalance());
+
+		Field[] fields = accountClass.getDeclaredFields();
+		System.out.println("Fields in Account class");
+		for (Field field : fields)
+			System.out.println(field.getName());
+	}
+
+}