Java Programming Examples

b.java

java

public class HelloWorld{

     public static void main(String []args){
        System.out.println("Hello World");
     }
}

proojeto criando um Livro

java

//Disciplina; Programaçao orientada a objetos
//Professor; Orlewilson 
//Autor; Carlos Eduardo

import java.util.Scanner;

public class Livro {
    
 // atributos
 private int qtdpaginas; 
 private String genero;
 private String autor;
 private String editora;
 private String sumario;
 private String idioma;
 private int ano;
 private String titulo;
 private String sinopse;
 private int peso;
 private int preco;
 
 // metodos 
 public void setqtdpaginas(int Qtdpaginas){
 this.qtdpaginas= Qtdpaginas;
 }
 public void setgenero(String Genero){
 this.genero= Genero;
 }
 public void setautor(String autor){
 this.autor= autor;
 }
 public void seteditora(String editora){
 this.editora= editora;
 }
 public void setsumario(String sumario){
 this.sumario= sumario;
 }
 public void setidioma(String idioma){
 this.idioma= idioma;     
 }
 public void setano(int ano){
 this.ano= ano;
 }
 public void settitulo(String titulo){
 this.titulo= titulo;
 }
 public void setsinopse(String sinopse){
 this.sinopse= sinopse;
 }
 public void setpeso(int peso){
 this.peso= peso;
 } 
 public void setpreco(int preco){
 this.preco= preco;
 }
 
 
 public int getqtdpaginas(){
 return this.qtdpaginas;
 }
 public String getgenero(){ 
 return this.genero;
 }
 public String getautor(){
 return this.autor;
 }
 public String geteditora(){
 return this.editora;
 }
 public String getsumario(){
 return this.sumario;
 }
 public String getidioma(){
 return this.idioma;     
 } 
 public int getano(){
 return this.ano;
 }
 public String gettitulo(){
 return this.titulo;
 }
 public String getsinopse(){
 return this.sinopse;
 }
 public int getpeso(){
 return this.peso;
 }
 public int getpreco(){
 return this.preco;
}



 // construtor sem argumentos
 
 public Livro(){
     
     this.qtdpaginas=0;
     this.genero="";
     this.autor="";
     this.editora="";
     this.sumario="";
     this.idioma="";
     this.ano=0;
     this.titulo="";
     this.sinopse="";
     this.peso=0;
     this.preco=0;
 }


public static void main(String []args){
        Livro SenhordosAneis = new Livro();
        
        Livro got = new Livro("SenhordosAneis", "drama", "martin", "asd", "sada", "portugues", 2000,1000, 152, "sdasd", 152);
        
        
        //String valor = sc.nextLine();
        String valor = "Senhor dos aneis";


        SenhordosAneis.settitulo("senhor dos aneis");
        SenhordosAneis.setgenero("drama");
        SenhordosAneis.setautor("tiririca");
        SenhordosAneis.seteditora("abril");
        SenhordosAneis.setsumario("");
        SenhordosAneis.setidioma("mandarin");
        SenhordosAneis.setano(500);
        SenhordosAneis.setqtdpaginas(1000);
        SenhordosAneis.setsinopse("");
        SenhordosAneis.setpeso(0);
        SenhordosAneis.setpreco(0);
         
         
        
        System.out.println("titulo:" +  SenhordosAneis.gettitulo());
        
        
                System.out.println("genero: " + SenhordosAneis.getgenero());
                System.out.println("autor: " + SenhordosAneis.getautor());
        System.out.println("editora: " + SenhordosAneis.geteditora());
        System.out.println("sumario: " + SenhordosAneis.getsumario());
        System.out.println("idioma: " + SenhordosAneis.getidioma());
        System.out.println("ano: " + SenhordosAneis.getano());
        System.out.println("qtdpaginas: " + SenhordosAneis.getqtdpaginas());
        System.out.println("sinopse: " + SenhordosAneis.getsinopse());
        System.out.println("peso: " + SenhordosAneis.getpeso());
        System.out.println("preco: " + SenhordosAneis.getpreco());
        
        System.out.println("titulo:" +  got.gettitulo());
                    System.out.println("genero: " + got.getgenero());
                System.out.println("autor: " + got.getautor());
        System.out.println("editora: " + got.geteditora());
        System.out.println("sumario: " + got.getsumario());
        System.out.println("idioma: " + got.getidioma());
        System.out.println("ano: " + got.getano());
        System.out.println("qtdpaginas: " + got.getqtdpaginas());
        System.out.println("sinopse: " + got.getsinopse());
        System.out.println("peso: " + got.getpeso());
        System.out.println("preco: " + got.getpreco());
    
}
 
       // construtor com argumentos 
       public Livro (String titulo, String genero, String autor, String editora, String sumario, String idioma, int ano,int qtdpaginas, int peso, String sinopse, int preco){
           
           this.titulo = titulo;      
           this.genero = genero;
           this.autor = autor;
           this.editora = editora;
           this.sumario = sumario;
           this.idioma = idioma; 
           this.ano = ano;
           this.qtdpaginas = qtdpaginas;
           this.peso = peso;
           this.sinopse = sinopse;
           this.preco = preco;
           
       }

}

https://tpcg.io/SDHc2A

java

public class HelloWorld{

     public static void main(String []args){
        System.out.println("Hello World");
     }
}

Flight.java

java

/*----------------------------------------------------------------------------
 * Author: Caleb Farr
 * Email: [email protected]
 * 
 *
 * 
 * 
 *
 * Example: 
 *--------------------------------------------------------------------------*/

public class Flight {
    
    public static final double EARTH_RAD = 3963.1676;
    
    public static void main(String []args) {
    double hlat;
    double hlon;
    double dlat;
    double dlon;
    char hvertdir;
    char dvertdir;
    char hhoridir;
    char dhoridir;
    hlat = Double.parseDouble(args[0]);
    hvertdir = args[1].charAt(0);
    hlon = Double.parseDouble(args[2]);
    hhoridir = args[3].charAt(0);
    dlat = Double.parseDouble(args[4]);
    dvertdir = args[5].charAt(0);
    dlon = Double.parseDouble(args[6]);
    dhoridir =  args[7].charAt(0);

    System.out.println ("Home Latitude is " + hlat + " " + hvertdir);
    /*
    S = -1 * args[0]; //NO, do not use args here
    S = -1 * args[4];
    W = -1 * args[2];
    W = -1 * args[6];
    */
    
    double radhlat;
    double radhlot;
    double raddlat;
    double raddlon;
    
    Math.toRadians(hlat) = radhlat; 
    Math.toRadians(hlon) = radhlot;
    Math.toRadians(dlat) = raddlat;
    Math.toRadians(dlon) = raddlon;
    /*
    double v1;
    double v2;
    
    double vf; 
    
    v1 = Math.pow(Math.sin((dlat - hlat)/2.0), 2.0);
    v2 = Math.pow(Math.sin((dlon - hlon)/2.0), 2.0);
    vf = (v1 + v2) * (Math.cos(hlat) * Math.cos(hlon));
    
    double d;

    d = 2 * EARTH_RAD * Math.atan2(Math.sqrt(vf), Math.sqrt(1 - vf));
    */
    
     }
}

sssssssssssssssssssssssssssssssssssssssssssssssss

java

int number= 100
System.out.println(number)

Section2-ConstructorDemo

java

import java.util.Random;
import java.math.BigInteger;
import java.net.HttpCookie;
import java.util.GregorianCalendar;

/**
 * Demonstrates the creation of objects and their initialization
 * with constructors.
 * 
 * @author Brett Treas
 */
 public class ConstructorDemo {
    
    public static void main(String[] args){
        Random rand = new Random();
        BigInteger num = new BigInteger("654564654321566");
        HttpCookie cookie = new HttpCookie("username", "btreas");        
        GregorianCalendar today = new GregorianCalendar();
        GregorianCalendar bDay = new GregorianCalendar(1987, 11, 24);
        
        
    }
}

ConstructorDemo

java

import java.util.Random;
import java.math.BigInteger;
import java.net.HttpCookie;
import java.util.GregorianCalendar;

/**
 * Demonstrates the creation of objects and their initalization
 * with constructors.
 * 
 * @author Lauren Ferrara
 */
public class ConstructorDemo {

    public static void main(String []args){
        Random rand = new Random();
        BigInteger num = new BigInteger("23433463575321352463654757");
        HttpCookie cookie = new HttpCookie("username", "lferrara");
        GregorianCalendar today = new GregorianCalendar();
        GregorianCalendar bDay = new GregorianCalendar(1999, 10, 28);
        
    }
}

Section2-ConstructorDemo

java

import java.util.Random;
import java.math.BigInteger;
import java.net.HttpCookie;
import java.util.GregorianCalendar;

/**
 * Demonstrates the creation of objects and their initialization
 * with constructors.
 * 
 * @author Drue Coles
 */
public class ConstructorDemo {

     public static void main(String []args) {
        Random rand = new Random();
        BigInteger num = new BigInteger("3459843759375983753954");
        HttpCookie cookie = new HttpCookie("username", "dcoles");
        GregorianCalendar today = new GregorianCalendar();
        GregorianCalendar bDay = new GregorianCalendar(1963, 10, 17); 
     }
}

ConstructorDemo

java

import java.util.Random; 
import java.math.BigInteger;
import java.net.HttpCookie;
import java.util.GregorianCalendar;

/**
 * Demonstrates the creation of objects and their initialization 
 * with constructors.
 * 
 * @author Fenton Krupp
 */


public class ConstructorDemo {
   
    public static void main(String []args) {
        Random rand = new Random();
        BigInteger num = new BigInteger("53258763287569863463270");
        HttpCookie cookie = new HttpCookie("username", "password");
        GregorianCalendar today = new GregorianCalendar();
        GregorianCalendar birthday = new GregorianCalendar(2001, 3, 8);
        
        System.out.print("_____\n\\   / \n \\ /  \n |0|   \n / \\  \n/   \\\n---- ");
        
        
    }
}

ArithmaticDemo

java

/**
 * Demonstrates the five arithmatic operators.
 * 
 * @author Wulff Brinton-Wilson
 */
public class EmptyProgram {
    public static void main(String[] args) {
        int x = 13;
        int y = 5;
        
        //perform some arithmatic
        int z1 = x + y;
        int z2 = x - y;
        int z3 = x * y;
        int z4 = x / y;
        int z5 = x % y;
        /*
          This is a multiline comment that
          is really pretty useless but I have
          to say something
        */
        System.out.println(z1);
        System.out.println(z2);
        System.out.println(z3);
        System.out.println(z4);
        System.out.println(z5);
        
        System.out.println(x * 7 + y);
    }
}

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