![\"escalera-java\"](\"http:\/\/www.palentino.es\/blog\/wp-content\/uploads\/2014\/02\/escalera-java.jpg\")
<\/a><\/p>\n
\nimport java.io.BufferedReader;
\nimport java.io.IOException;
\nimport java.io.InputStreamReader;
\nimport java.util.Random;
\nimport java.util.logging.Level;
\nimport java.util.logging.Logger;<\/p>\n
\/*
\n* To change this license header, choose License Headers in Project Properties.
\n* To change this template file, choose Tools | Templates
\n* and open the template in the editor.
\n*\/<\/p>\n
\/**
\n*
\n* @author golden
\n*\/
\npublic class rectangulo {
\npublic static void pintar_cuadrado(int columnas_numero, int filas_numero){
\nint fila_actual=1;
\nint num_aleatorio;
\nint fila_resto;
\nfor (int i=0; i < filas_numero; i++) {
\nfor(int j=0; j<columnas_numero;j++){
\nfila_resto=fila_actual%2;
\nif(fila_resto==0){
\nnum_aleatorio=(int) Math.floor(Math.random()*10);
\nSystem.out.print(num_aleatorio + “”);
\n}
\nif(fila_resto!=0){
\nif(j==0){
\nnum_aleatorio=(int) Math.floor(Math.random()*10);
\nSystem.out.print(num_aleatorio);<\/p>\n
}
\nelse
\nif(j==columnas_numero-1){
\nnum_aleatorio=(int) Math.floor(Math.random()*10);
\nSystem.out.print(num_aleatorio);
\n}else{
\nSystem.out.print(” “);
\n}
\n}
\n}
\nSystem.out.println();
\nfila_actual ++;
\n}
\n}
\npublic static boolean comprobar(String cadena){
\nfor(int i=0;i<cadena.length();i++){
\nif (cadena.charAt(i)<=48 || cadena.charAt(i)>=57) {
\nSystem.out.println(“Error, introduce un numero”);
\nreturn false;<\/p>\n
}<\/p>\n
}
\nreturn true;
\n}<\/p>\n
public static void main(String[] args) {
\ntry {
\nBufferedReader teclado = new BufferedReader(new InputStreamReader(System.in));
\nString ancho;
\nString largo;<\/p>\n
\/\/char ancho2=ancho.charAt(0);<\/p>\n
System.out.println(“Introduce el ancho del rectangulo”);
\nancho=teclado.readLine(); while (!comprobar(ancho)){<\/p>\n
ancho=teclado.readLine();
\n}<\/p>\n
System.out.println(“Introduce el largo del rectangulo”);
\nlargo=teclado.readLine();
\nwhile (!comprobar(largo)){
\nlargo=teclado.readLine();<\/p>\n
}
\n\/\/Ahora hago el casting
\nint ancho_numero=Integer.parseInt(ancho);
\nint largo_numero=Integer.parseInt(largo);<\/p>\n
pintar_cuadrado(ancho_numero,largo_numero);<\/p>\n
} catch (IOException ex) {
\nLogger.getLogger(rectangulo.class.getName()).log(Level.SEVERE, null, ex);
\n}
\n}
\n}<\/p>\n","protected":false},"excerpt":{"rendered":"
Os dejo el c\u00f3digo fuente de un programa realizado en JAVA, empleado generalmente para prop\u00f3sitos formativos y que he llamado la escalera n\u00famerica. He creado esta escalera para ayudar a los estudiantes a comenzar a programar estructuras iterativas y condicionales. Es ideal para comenzar a programar. Para elaborar la escalera es necesario generar n\u00fameros aleatorios y cada fila impar s\u00f3lo representar el primer y ultimo n\u00famero. Se pide y valida por teclado las dimensiones. Su salida usando el IDE Netbeans es esta:<\/p>\n","protected":false},"author":1,"featured_media":5784,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[532,533,57],"class_list":["post-6432","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-varios","tag-ejercicio","tag-escalera","tag-java"],"_links":{"self":[{"href":"https:\/\/www.palentino.es\/blog\/wp-json\/wp\/v2\/posts\/6432","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.palentino.es\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.palentino.es\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.palentino.es\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.palentino.es\/blog\/wp-json\/wp\/v2\/comments?post=6432"}],"version-history":[{"count":4,"href":"https:\/\/www.palentino.es\/blog\/wp-json\/wp\/v2\/posts\/6432\/revisions"}],"predecessor-version":[{"id":6437,"href":"https:\/\/www.palentino.es\/blog\/wp-json\/wp\/v2\/posts\/6432\/revisions\/6437"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.palentino.es\/blog\/wp-json\/wp\/v2\/media\/5784"}],"wp:attachment":[{"href":"https:\/\/www.palentino.es\/blog\/wp-json\/wp\/v2\/media?parent=6432"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.palentino.es\/blog\/wp-json\/wp\/v2\/categories?post=6432"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.palentino.es\/blog\/wp-json\/wp\/v2\/tags?post=6432"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}