The document contains 9 Java programs (Ejercicio_1 through Ejercicio_9) that demonstrate various exercises using arrays and vectors. Each program defines a class with a main method that declares variables, initializes arrays/vectors, uses loops to input/output values, and performs basic operations like summing, averaging, searching.

1. /*
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package ejercicio_1;
import java.util.Scanner;
/**
*
* @author user
*/
public class Ejercicio_1 {
/**
* @param args the command line arguments
*/
public static int dimension, c, multiplicacion=1;
public static Scanner scn = new Scanner(System.in);
public static void main(String[] args) {
// TODO code application logic here
System.out.println("ingrese la dimension del arreglo");
dimension = scn.nextInt();
int vec[] = new int[dimension];
for (c = 0; c <= (dimension - 1); c = c + 1) {
System.out.println("Ingrese los numeros solo del 1 al 9");
System.out.println("Numeros " + c);
vec[c] = scn.nextInt();
if (vec[c] >= 0 & vec[c] <= 9) {
} else {
System.out.println("fuera de rango solo numeros del 0 al 9");
}
}
for (c = 0; c <= dimension; c++) {
System.out.println(c + ": " + vec[c]);
multiplicacion = multiplicacion * vec[c];
System.out.println("Multiplicacion " + multiplicacion);
}
}
}
……………………………………………………

2. /*
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package ejercicio2;
import java.util.Scanner;
/**
*
* @author user
*/
public class Ejercicio2 {
/**
* @param args the command line arguments
*/
public static int dimension, co, posicion;
public static String nombre;
public static Scanner scn = new Scanner(System.in);
public static void main(String[] args) {
// TODO code application logic here
System.out.println("Ingrese la Dimension del vector");
dimension = scn.nextInt();
String vec[] = new String[dimension];
System.out.println("Ingrese el nombre que desea buscar ");
nombre = scn.next();
for (co = 0; co <= (dimension - 1); co = co + 1) {
System.out.println("Ingrese el nombre " + co);
vec[co] = scn.next();
if (vec[co].equals(nombre)) {
posicion = co;
System.out.println("SI EXISTE");
System.out.println("Esta en la pocicion " + posicion);
} else {
System.out.println("NO EXISTE");
}
}
}
}

3. /*
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package ejercicio3;
import java.util.Scanner;
/**
*
* @author user
*/
public class Ejercicio3 {
/**
* @param args the command line arguments
*/
public static int co,co2,co3;
public static String aux,cadena;
public static Scanner scn=new Scanner(System.in);
public static void main(String[] args) {
// TODO code application logic here
System.out.println("Ingrese la la palabra o el texto");
cadena=scn.next();
for(co=cadena.length()-1;co>=0;co=co-1){
aux=aux+cadena.charAt(co);
for(co2=0;co2<=aux.length()-1;co++){
if(aux.charAt(co2)==cadena.charAt(co2)){
co3++;
}
}
}
if(co3==cadena.length()){
System.out.println("Es un Palondrimo");
}else{
System.out.println("No es un Palondrimo");
}
}
}
__________________________________________

4. /*
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package ejercicio4;
import java.util.Scanner;
/**
*
* @author user
*/
public class Ejercicio4 {
/**
* @param args the command line arguments
*/
public static int co, dimension, aux, posicion;
public static Scanner scn = new Scanner(System.in);
public static void main(String[] args) {
// TODO code application logic here
System.out.println("Ingrese la dimension del vector");
dimension = scn.nextInt();
int vec[] = new int[dimension];
for (co = 0; co <= (dimension - 1); co = co + 1) {
System.out.println("Ingrese los numeros");
System.out.println("numero " + co);
vec[co] = scn.nextInt();
aux = vec[co];
if (aux >= vec[co]) {
posicion = co;
}
}
System.out.println("El numero mayor es " + aux);
System.out.println("Y esta en la posicion " + posicion);
}
}

5. /*
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*/
package ejercicio5;
import java.util.Scanner;
* @author user
*/
public class Ejercicio5 {
/**
* @param args the command line arguments
*/
public static int co, dimension, auxmayor, promedio, auxmenor, ac;
public static Scanner scn = new Scanner(System.in);
public static void main(String[] args) {
// TODO code application logic here
System.out.println("Ingrese la dimension del vector");
dimension = scn.nextInt();
int vec[] = new int[dimension];
for (co = 0; co <= (dimension - 1); co = co + 1) {
System.out.println("Ingrese los numeros");
System.out.println("Numero" + co);
vec[co] = scn.nextInt();
auxmayor = vec[0];
if (auxmayor > vec[co]) {
auxmayor = vec[co];
}
auxmenor = vec[0];
if (auxmenor < vec[co]) {
auxmenor = vec[co];
}
ac = ac + vec[co];
}
promedio = ac / co;
System.out.println("El numero Menor es= " + auxmayor);
System.out.println("El numero Mayor es= " + auxmenor);
System.out.println("Suma= " + ac);
System.out.println("Promedio= " + promedio);
}
}

6. /*
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package ejercicio6;
/**
*
* @author user
*/
public class Ejercicio6 {
/**
* @param args the command line arguments
*/
public static int num=1,num2=1,num3=0,co=0;
public static void main(String[] args) {
// TODO code application logic here
int vec[]=new int [10];
for(co=1;co<=9;co=co+1){
num3=(num3-num)+(num2-2);
num=num;
num2=num3;
vec[co]=num3;
System.out.println(vec[co]);
}
}
}

7. /*
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*/
package ejercicio8;
import java.util.Scanner;
/**
*
* @author user
*/
public class Ejercicio8 {
/**
* @param args the command line arguments
*/
public static int dimension,co,posicion;
public static Scanner scn=new Scanner(System.in);
public static void main(String[] args) {
// TODO code application logic here
System.out.println("Ingrese la dimension del vector");
dimension=scn.nextInt();
int vec[]=new int [dimension];
for(co=0;co<=(dimension-1);co=co+1){
System.out.println("Ingrese los numeros");
System.out.println("numero"+co);
vec[co]=scn.nextInt();
if(vec[co]%2==0){
posicion=co;
System.out.println(vec[co]);
System.out.println(posicion);
}
}
}
}

8. /*
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package ejercicio9;
import java.util.Scanner;
/**
*
* @author user
*/
public class Ejercicio9 {
/**
* @param args the command line arguments
*/
public static int secuencia=1,co=0,secuencia2;
public static int vec[]=new int [20];
public static Scanner scn=new Scanner(System.in);
public static void main(String[] args) {
// TODO code application logic here
for(co=1;co<=20;co=co+1){
if(co%2!=0){
secuencia2=secuencia-4;
vec[co]=secuencia;
}
else if(co%2==0){
secuencia2=secuencia+5;
vec[co]=secuencia2;
}
System.out.println(vec[co]);
}
}
}