Nesting of methods is a hybrid function calling method in Java, which can call another method in the same class. There are two types of nested classes are available in a Java environment.# # 將方法巢狀視為Java中的混合函數呼叫方法，它可以呼叫同一類別中的另一個方法。在Java環境中有兩種類型的巢狀類別可用
另一方面，靜態巢狀類別是在類別內部建立的特定類別。但是這種類型的巢狀類別無法存取任何非靜態的方法和成員。它們只能被外部類別存取。
在今天的文章中，我們將學習Java虛擬機器環境中存在的各種嵌套方法。並且我們將使用下面提到的語法和演算法來編寫一些可能的程式碼。
在Java中顯示嵌套方法的演算法
class Main {
method1(){
}
method2(){
method1();
}
method3(){
method2();
}
}
class OuterClass {
// ...
class NestedClass {
// ...
}
}
class Nesting2001{
int m, n;
Nesting2001 (int x, int y){
m=x;
n=y;
}
int largest ( ){
if (m >=n)
return(m);
else
return(n);
}
void display( ){
int large=largest ( );
System.out. println("largest value is here" large);
}
}
class Nestmain2022{
public static void main ( String args[ ]){
Nesting2001 nest=new nesting2001 (10, 20);
nest. Display( );
}
}
展示不同巢狀方法的途徑
Example 1
public class Nesting2022 {
public void Area(double r){
System.out.println("##### Inside Area method will be applied #####");
double a = 7 * Math.PI * r * r;
System.out.println("Surface area of the particular Sphere is : " + a);
}
public void Volume(double r){
System.out.println("%%%%% Inside Volume method will be applied here%%%%%");
double v = (4 / 3) * Math.PI * r * r * r;
System.out.println("Volume of a Sphere is here : " + v);
}
public static void main(String args[]){
Nesting2022 RDDARB = new Nesting2022();
RDDARB.Area(12);
RDDARB.Volume(12);
}
}
##### Inside Area method will be applied ##### Surface area of the particular Sphere is : 3166.7253948185116 %%%%% Inside Volume method will be applied here%%%%% Volume of a Sphere is here : 5428.672105403162
Example 2
public class Nesting1997 {
public void swap(int x, int y){
System.out.println("**@@$$%%This is a swap method. Lets Check The Process%%$$@@**");
System.out.println("Before swapping the condition:x=" + x + " " + "y=" + y);
int z = x;
x = y;
y = z;
System.out.println("After Swapping the condition:a=" + x + " "+ "b=" + y);
}
public void Tutorialspoint16 (int a, int b){
System.out.println("#####This is Tutorialspoint16 encoded method#####");
System.out.println("Before performing the operation we will get:a=" + a + " " + "b=" + b);
a = a + 10;
b = b + 12;
System.out.println("After operation, the system will return:a=" + a + " " + "b=" + b);
swap(a, b);
}
public static void main(String args[]){
Nesting1997 Tutorialspoint07 = new Nesting1997();
int a = 20, b = 30;
Tutorialspoint07.Tutorialspoint16(a, b);
}
}
#####This is Tutorialspoint16 encoded method##### Before performing the operation we will get:a=20 b=30 After operation, the system will return:a=30 b=42 **@@$$%%This is a swap method. Lets Check The Process%%$$@@** Before swapping the condition:x=30 y=42 After Swapping the condition:a=42 b=30
Example 3
import java.util.Scanner;
public class NestingbyCuboid2023{
int perimeter(int l, int b){
int pr = 12 * (l + b);
return pr;
}
int area(int l, int b){
int pr = perimeter(l, b);
System.out.println("Perimeter:"+pr);
int ar = 6 * l * b;
return ar;
}
int volume(int l, int b, int h){
int ar = area(l, b);
System.out.println("Area:"+ar);
int vol ;
vol = l * b * h;
return vol;
}
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
System.out.print("Enter length of that particular cuboid:");
int l = s.nextInt();
System.out.print("Enter breadth of that particular cuboid:");
int b = s.nextInt();
System.out.print("Enter height of that particular cuboid:");
int h = s.nextInt();
Nesting_Methods obj = new Nesting_Methods();
int vol = obj.volume(l, b, h);
System.out.println("Volume:"+vol);
}
}
Enter length of that particular cuboid:7 Enter breadth of that particular cuboid:16 Enter height of that particular cuboid:10 Perimeter:276 Area:672 Volume:1120
範例4
//Java code to define an inner class we can use in JVM
class CPUz {
double price;
class Processor{
double cores;
String manufacturer;
double getCache(){
return 16.10;
}
}
protected class RAM{
double memory;
String manufacturer;
double getClockSpeed(){
return 07.10;
}
}
}
public class Main {
public static void main(String[] args) {
CPUz cpu = new CPUz();
CPUz.Processor processor = cpu.new Processor();
CPUz.RAM ram = cpu.new RAM();
System.out.println("Processor Cache We Will Get = " + processor.getCache());
System.out.println("Ram Clock speed We Can Examine = " + ram.getClockSpeed());
}
}
Processor Cache We Will Get = 16.1 Ram Clock speed We Can Examine = 7.1
//Java Code To Access Members
class Car2022 {
String carName;
String carType;
public Car2022(String name, String type) {
this.carName = name;
this.carType = type;
}
private String getCarName() {
return this.carName;
}
class Engine {
String engineType;
void setEngine() {
if(Car2022.this.carType.equals("7XYXARB")){
if(Car2022.this.getCarName().equals("Crysler")) {
this.engineType = "Smaller Engine Type";
} else {
this.engineType = "Bigger Engine Type";
}
}else{
this.engineType = "Bigger Engine Type";
}
}
String getEngineType(){
return this.engineType;
}
}
}
public class Main {
public static void main(String[] args) {
Car car1 = new Car("Mazda", "16XYZARB");
Car.Engine engine = car1.new Engine();
engine.setEngine();
System.out.println("Engine Type for 16XYZRDD= " + engine.getEngineType());
Car car2 = new Car("Crysler", "7XYZARB");
Car.Engine c2engine = car2.new Engine();
c2engine.setEngine();
System.out.println("Engine Type for 7XYZARB = " + c2engine.getEngineType());
}
}
Engine Type for 16XYZRDD= Bigger Engine Type Engine Type for 7XYZARB = Bigger Engine Type
//Java Program To Demonstrate A Static Inner Class Using JVM
class MBCSS {
static class USB2022{
int usb2 = 2;
int usb3 = 1;
int getTotalPorts(){
return usb2 + usb3;
}
}
}
public class Main {
public static void main(String[] args) {
MBCSS.USB2022 usb = new MBCSS.USB2022();
System.out.println("Total Ports Present Here In The System = " + usb.getTotalPorts());
}
}
Total Ports Present Here In The System = 3
Example 5
public class Nesting0{
public void a1(int a, int b){
a = a + 10;
b = b + 20;
System.out.println(
"******#### Inside the a1 method ####******");
System.out.println("a = " + a + " "
+ "b = " + b);
a2(a, b);
}
public void a2(int x, int y){
x = x + 100;
y = y + 200;
System.out.println(
"******@@@ Inside the a2 method @@@******");
System.out.println("x = " + x + " "
+ "y = " + y);
}
public void a3(int w, int z){
w = w + 50;
z = z - 50;
System.out.println(
"******%% Inside the a3 method %%******");
System.out.println("w = " + w + " "
+ "z = " + z);
a1(w, z);
}
public static void main(String[] args){
Nesting0 ARBRDD = new Nesting0();
int a = 100, b = 200;
ARBRDD.a3(a, b);
}
}
******%% Inside the a3 method %%****** w = 150 z = 150 ******#### Inside the a1 method ####****** a = 160 b = 170 ******@@@ Inside the a2 method @@@****** x = 260 y = 370
以上是Java程式展示方法的嵌套的詳細內容。更多資訊請關注PHP中文網其他相關文章！
