Java qanday qismlardan iborat va bu qismlarni tushuntiring? Jdk, jre va jvm lar nima va qanday vazifalarni bajaradi?

public class ReplaceExample{
public static void main(String args[]){
String s1="my name is program my name is java";
String replaceString=s1.replace("is","was");
//replaces all occurrences of "is" to "was"
System.out.println(replaceString);
}}

45. 
    Quyidagi kod ektanga nimani chiqaradi?
    

public class LengthExample{
public static void main(String args[]){
String s1="javatpoint";
String s2="python";
System.out.println("string length is: "+s1.length());
//javatpoint ning uzunligi 10 ga teng
System.out.println("string length is: "+s2.length());
//python uzunligi 6 ga teng
}}

46. 
    Quyidagi kod ektanga nimani chiqaradi?
    

public class FormatExample{
public static void main(String args[]){
String name="sonoo";
String sf1=String.format("name is %s",name);
String sf2=String.format("value is %f",32.33434);
String sf3=String.format("value is
%32.12f",32.33434);
System.out.println(sf1);
System.out.println(sf2);
System.out.println(sf3);
}}

47. 
    Quyidagi kod ektanga nimani chiqaradi?
    

public class SplitExample{
public static void main(String args[]){
String s1="java string split method by dasturchi";
String[] words=s1.split("\\s");
for(String w:words){
System.out.println(w);}
}}

48. 
    Quyidagi kod ektanga nimani chiqaradi?
    

public class Test{
public static void main(String args[]){
int a=10;
int b=20;
int c=25;
int d=25;
System.out.println("a+b="+(a+b));
System.out.println("a-b="+(a-b));
System.out.println("a*b="+(a*b));
System.out.println("b/a="+(b/a));
System.out.println("b%a="+(b%a));
System.out.println("c%a="+(c%a));
System.out.println("a++="+(a++));
System.out.println("b--="+(a--));
//d++ va ++d lardagi farqlarga etibor bering
System.out.println("d++="+(d++));
System.out.println("++d="+(++d));
}}

49. 
    Quyidagi kod ektanga nimani chiqaradi?