string in java

public class StringDemoExample {
public static void main(String[] args) {
String s1 = “nag”;
String s2 = “nag”;
String s3 = s1;
String s4 = new String(“nag”);
String s5 = new String(“nag”);
System.out.println(s1 == s2);
System.out.println(s1 == s3);
System.out.println(s1.equals(s3));
System.out.println(s1 == s4);
System.out.println(s1.equals(s4));
System.out.println(s4 == s5);
System.out.println(s4.equals(s5));
}
}

What is the output of the about example?

sample programs for java beginners

public class Demo{
public static void main(String args[]){
display();
}
static void display() {
System.out.println(“Hello java!”);
}
}

what is the output of above code?

sample programs for java beginners

import java.util.Scanner;
public class Demo{
public static void main(String args[]){
int a, b, c, d;
System.out.println(“Enter range of numbers to print their multiplication table”);
Scanner in = new Scanner(System.in);
a = in.nextInt();
b = in.nextInt();
for (c = a; c <= b; c++) {
System.out.println(“Multiplication table of “+c);
for (d = 1; d <= 10; d++) {
System.out.println(c+”*”+d+” = “+(c*d));
}
}
}
}

sample programs for java beginners

import java.util.Scanner;
public class MultiplyTableDemo{
public static void main(String args[]){
int n, c;
System.out.println(“Enter an integer “);
Scanner in = new Scanner(System.in);
n = in.nextInt();
System.out.println(“Multiplication table of “+n+” is :”);
for ( c = 1 ; c <= 10 ; c++ )
System.out.println(n+”*”+c+” = “+(n*c));
}
}

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sample programs for java beginners

public class DemoProgram{
public static void main(String[] args){
boolean learning = true;
if (learning) {
System.out.println(“Java programmer”);
}
else {
System.out.println(“Hello java world!”);
}
}
}

What is the output of above code?

sample programs for java beginners

public class DemoProgram{

public static void main(String[] args){
int c;

for (c = 1; c <= 10; c++) {
System.out.println(c);
}
}
}

 

What is the output of bellow code?

 

what is the output of below code in java

public class DemoProgram{

public static void main(String[] args){
int x=3;

while(x > 0){

if(x > 2){

System.out.print(“a”);

}
x=x-1;

System.out.print(“-“);

if(x==2){

Sytem.out.print(“b,c”);

}

if(x==1){

Sytem.out.print(“d”);

x=x-1;

}

}

}

}

how to remove letters from a string in java

public class StringDemo {

public static void main(String[] args) {
String str = “123naga456raju789”;
str = str.replaceAll(“[^\\d.]”, “”);

System.out.println(str);
}

}

output:

123456789

how to remove numbers from a string in java

public class StringDemo {

public static void main(String[] args) {
String firstname1 = “na12345ga45ra475ju”;
firstname1 = firstname1.replaceAll(“[0-9]”,””);
System.out.println(firstname1);

}

}

Output:

nagaraju

String length without using length() method

public class StringDemo{

public static void main(String []args){
String blah = “www.chennarapu.com”;
int count = 0;
for(char c : blah.toCharArray())
{
count++;
}
System.out.println(“String length is : ” + count);

}
}

Output:

String length is : 18