{"id":802,"date":"2024-10-20T21:26:40","date_gmt":"2024-10-20T21:26:40","guid":{"rendered":"https:\/\/javigomez.org\/?p=802"},"modified":"2025-09-29T20:32:51","modified_gmt":"2025-09-29T20:32:51","slug":"u2-ejercicios-java","status":"publish","type":"post","link":"https:\/\/javigomez.org\/index.php\/2024\/10\/20\/u2-ejercicios-java\/","title":{"rendered":"U2 Ejercicios Java"},"content":{"rendered":"\n<p>A continuaci\u00f3n se ponen 10 ejercicios de java. Al final est\u00e1n todos los c\u00f3digos que se ven en el video.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"U2 Ejercicios Parte 1\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube.com\/embed\/offlBIXg4o0?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"U2 Ejercicios Parte 2\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube.com\/embed\/GwC7te5WPFM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>\/*\n * P2.1) Declara dos variables num\u00e9ricas (con el valor que desees), \n * muestra por consola la suma, resta, multiplicaci\u00f3n, divisi\u00f3n y \n * m\u00f3dulo (resto de la divisi\u00f3n).\n *\/\npackage U02;\n\npublic class E2_01 {\n\n\tpublic static void main(String&#91;] args) {\n\t\t\n\t\tint num1=10;\n\t\tint num2=5;\n\t\t\n\t\tSystem.out.println(\"suma: \" + (num1+num2));\n\t\tSystem.out.println(\"resta: \" + (num1-num2));\n\t\tSystem.out.println(\"multiplicaci\u00f3n: \" + (num1*num2));\n\t\tSystem.out.println(\"divisi\u00f3n: \" + (num1\/num2));\n\t\tSystem.out.println(\"m\u00f3dulo: \" + (num1%num2));\n\t\t\n\t\t\n\n\t}\n\n}\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/*\n * P2.2) Declara un String que contenga tu nombre, \n * despu\u00e9s muestra un mensaje de bienvenida por consola. \n * Por ejemplo: si introduzco \u00abJavi\u00bb, me aparezca \u00abBienvenido Javi\u00bb.\n *\/\npackage U02;\n\npublic class E2_02 {\n\n\tpublic static void main(String&#91;] args) {\n\t\tString nombre=\"Javi\";\n\t\tSystem.out.println(\"Bienvenido: \" + nombre);\n\n\t}\n\n}\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/*\n * P2.3) Modifica la aplicaci\u00f3n anterior, para que nos pida el nombre que queremos introducir\n *\/\n\npackage U02;\n\nimport java.util.Scanner;\n\npublic class E2_03 {\n\n\tpublic static void main(String&#91;] args) {\n\t\tScanner sc = new Scanner(System.in);\n\t\tSystem.out.println(\"Introduce el nombre: \");\n\t\tString nombre = sc.nextLine();\n\t\tSystem.out.println(\"Bienvenido: \" + nombre);\n\t\tsc.close();\n\t}\n\n}\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/*\n * P2.4) Haz una aplicaci\u00f3n que calcule el \u00e1rea de un c\u00edrculo(pi*R2). \n * El radio se pedir\u00e1 por teclado (recuerda pasar de String a double con Double.parseDouble). \n * Usa la constante PI y el m\u00e9todo pow de Math.\n *\/\npackage U02;\n\nimport java.util.Scanner;\n\npublic class E2_04 {\n\n\tpublic static void main(String&#91;] args) {\n\t\t\n\t\tScanner sc = new Scanner(System.in);\n\t\tSystem.out.println(\"Introduce el radio:\");\n\t\tdouble radio = sc.nextDouble();\n\t\tdouble area = Math.PI*Math.pow(radio,2);\n\t\t\n\t\tSystem.out.println(\"El area del c\u00edrculo es: \" + area);\n\t\t\n\n\t}\n\n}\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/*\n * P2.5) Lee un n\u00famero por teclado y muestra por consola, \n * el car\u00e1cter al que pertenece en la tabla ASCII. \n * Por ejemplo: si introduzco un 97, me muestre una a.\n *\/\npackage U02;\n\nimport java.util.Scanner;\n\npublic class E2_05 {\n\n\tpublic static void main(String&#91;] args) {\n\t\tScanner sc = new Scanner(System.in);\n\t\tSystem.out.println(\"Introduce un n\u00famero\");\n\t\tint num=sc.nextInt();\n\t\tchar car= (char)num;\n\t\t\n\t\tSystem.out.println(\"El caracter es: \" + car);\n\t\t\n\t\t\n\n\t}\n\n}\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/*\n * P2.6) Modifica el ejercicio anterior, para que, en lugar de pedir un n\u00famero, \n * pida un car\u00e1cter (char) y muestre su c\u00f3digo en la tabla ASCII.\n *\/\npackage U02;\n\nimport java.util.Scanner;\n\npublic class E2_06 {\n\n\tpublic static void main(String&#91;] args) {\n\t\tScanner sc=new Scanner(System.in);\n\t\t\n\t\tSystem.out.println(\"Introduce un caracter:\");\n\t\tchar car=sc.next().charAt(0);\n\t\tint cod=(int)car;\n\t\t\n\t\tSystem.out.println(\"El c\u00f3digo es: \" + cod);\n\n\t}\n\n}\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/*\n * P2.7) Lee un n\u00famero por teclado que pida el precio de un producto (puede tener decimales) \n * y calcule el precio final con IVA. El IVA ser\u00e1 una constante que ser\u00e1 del 21%.\n *\/\npackage U02;\n\nimport java.util.Scanner;\n\npublic class E2_07 {\n\n\tpublic static void main(String&#91;] args) {\n\t\tfinal double IVA=0.21;\n\t\tScanner sc = new Scanner(System.in);\n\t\t\n\t\tSystem.out.println(\"Introduce el precio:\");\n\t\tdouble precio = sc.nextDouble();\n\t\t\n\t\tdouble precioFinal= precio+(precio*IVA);\n\t\t\n\t\tSystem.out.println(\"El precio final es: \" + precioFinal);\n\t\t\t\t\n\t\t\n\t\t\n\n\t}\n\n}\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/*\n * P2.8) Reemplaza todas las a del String  por una e.\n *\/\npackage U02;\n\npublic class E2_08 {\n\n\tpublic static void main(String&#91;] args) {\n\t\tString cadena=\"Por diez ca\u00f1ones por banda, viento en popa a toda vela\";\n\t\t\n\t\tString cadena2=cadena.replace('a', 'e');\n\t\t\n\t\tSystem.out.println(cadena2);\n\t\t\n\n\t}\n\n}\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/*\n * P2.9) Mostrar la longitud de una cadena.\n *\/\npackage U02;\n\npublic class E2_09 {\n\n\tpublic static void main(String&#91;] args) {\n\t\tString cad=\"12345\";\n\t\t\n\t\tSystem.out.println(\"La longitud es:\" + cad.length());\n\n\t}\n\n}\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/*\n * P2.10) Dada una cadena, extraer la cuarta y quinta letra usando el m\u00e9todo substring.\n *\/\npackage U02;\n\npublic class E2_10 {\n\n\tpublic static void main(String&#91;] args) {\n\t\tString cad=\"Camino\";\n\t\t\n\t\tString c=cad.substring(3, 5);\n\t\tSystem.out.println(\"El caracter 3 y 4 es: \" + c);\n\n\t}\n\n}\n<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A continuaci\u00f3n se ponen 10 ejercicios de java. Al final est\u00e1n todos los c\u00f3digos que se ven en el video.<\/p>\n","protected":false},"author":1,"featured_media":803,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[51,127,203],"class_list":["post-802","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-basicos","tag-ejercicios","tag-java"],"_links":{"self":[{"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/posts\/802","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/comments?post=802"}],"version-history":[{"count":1,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/posts\/802\/revisions"}],"predecessor-version":[{"id":841,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/posts\/802\/revisions\/841"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/media\/803"}],"wp:attachment":[{"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/media?parent=802"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/categories?post=802"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/tags?post=802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}