diff --git a/script.js b/script.js
index 998df90..889ddfc 100644
--- a/script.js
+++ b/script.js
@@ -1,25 +1,163 @@
-document.getElementById('generateBtn').addEventListener('click', function() {
+document.getElementById('generateBtn').addEventListener('click', function () {
     const umlInput = document.getElementById('umlInput').value;
     const classList = extractClasses(umlInput);
 
     const classListElement = document.getElementById('classList');
     classListElement.innerHTML = '';
 
-    classList.forEach(className => {
-        const listItem = document.createElement('li');
-        listItem.textContent = className + '.java';
-        classListElement.appendChild(listItem);
-    });
+    const classContent = generateJavaClass(classList);
+    const preElement = document.createElement('pre');
+    preElement.textContent = classContent;
+    classListElement.appendChild(preElement);
 });
 
+function generateJavaClass(classDetails) {
+    let classCode = '';
+
+    // Importar las colecciones si es necesario
+    if (classDetails.some(classDetail => classDetail.attributes.some(attr => attr.type.includes('List')) || classDetail.associations.length > 0)) {
+        classCode += 'import java.util.ArrayList;\nimport java.util.List;\n\n';
+    }
+
+    classDetails.forEach(classDetail => {
+        const {
+            name,
+            type,
+            isAbstract,
+            extends: extendsClass,
+            implements: implementsInterfaces,
+            attributes,
+            methods,
+            associations
+        } = classDetail;
+
+        // Declarar la clase o interfaz
+        if (type === 'interface') {
+            classCode += `public interface ${name}`;
+        } else {
+            classCode += `public ${isAbstract ? 'abstract ' : ''}class ${name}`;
+        }
+        if (extendsClass) {
+            classCode += ` extends ${extendsClass}`;
+        }
+        if (implementsInterfaces && implementsInterfaces.length > 0) {
+            classCode += ` implements ${implementsInterfaces.join(', ')}`;
+        }
+        classCode += ' {\n';
+
+        // Generar atributos
+        attributes.forEach(attr => {
+            classCode += `    private ${attr.type} ${attr.name};\n`;
+        });
+
+        // Generar asociaciones
+        associations.forEach(assoc => {
+            const pluralizedName = assoc.name.endsWith('s') ? assoc.name : assoc.name + 's'; // Pluralizar correctamente
+            classCode += `    private List<${assoc.type}> ${pluralizedName} = new ArrayList<>();\n`;
+        });
+
+        // Generar constructor básico
+        if (type !== 'interface' && attributes.length > 0) {
+            classCode += `\n    public ${name}(${attributes.map(attr => `${attr.type} ${attr.name}`).join(', ')}) {\n`;
+            attributes.forEach(attr => {
+                classCode += `        this.${attr.name} = ${attr.name};\n`;
+            });
+            classCode += '    }\n';
+        }
+
+        // Generar métodos
+        methods.forEach(method => {
+            const methodSignature = `public ${method.returnType} ${method.name}(${method.parameters.map(param => `${param.type} ${param.name}`).join(', ')})`;
+            if (type === 'interface') {
+                classCode += `    ${methodSignature};\n`;
+            } else if (method.isAbstract) {
+                classCode += `    ${methodSignature};\n`;
+            } else {
+                classCode += `    ${methodSignature} {\n`;
+                classCode += `        // TODO: Implement ${method.name}\n`;
+                classCode += '    }\n';
+            }
+        });
+
+        classCode += '}\n\n';
+    });
+
+    return classCode;
+}
+
+function capitalize(string) {
+    return string.charAt(0).toUpperCase() + string.slice(1);
+}
+
 function extractClasses(umlText) {
-    const classPattern = /class\s+([a-zA-Z0-9_]+)/g;
-    let classNames = [];
-    let match;
+    const classPattern = /(abstract\s+)?(class|interface)\s+([a-zA-Z0-9_]+)\s*(?:extends\s+([a-zA-Z0-9_]+))?\s*(?:implements\s+([a-zA-Z0-9_,\s]+))?\s*{([^}]*)}/g;
+    const attributePattern = /[-+]\s*([a-zA-Z0-9_]+)\s*:\s*([a-zA-Z0-9_<>\[\]]+)/g;
+    const methodPattern = /\+\s*([a-zA-Z0-9_]+)\s*\(([^)]*)\)\s*:\s*([a-zA-Z0-9_]+)/g;
+    const associationPattern = /([a-zA-Z0-9_]+)\s*"1"\s*--\s*"0\.\.\*"\s*([a-zA-Z0-9_]+)/g;
+
+    let classDetails = [];
+    let classMatch;
+
+    // Bucle para cada clase encontrada
+    while ((classMatch = classPattern.exec(umlText)) !== null) {
+        const isAbstract = !!classMatch[1];
+        const type = classMatch[2];
+        const name = classMatch[3];
+        const extendsClass = classMatch[4] || null;
+        const implementsInterfaces = classMatch[5] ? classMatch[5].split(',').map(i => i.trim()) : [];
+        const body = classMatch[6];
+
+        let attributes = [];
+        let methods = [];
+        let associations = [];
+
+        let attributeMatch;
+        while ((attributeMatch = attributePattern.exec(body)) !== null) {
+            attributes.push({
+                name: attributeMatch[1],
+                type: attributeMatch[2]
+            });
+        }
+
+        let methodMatch;
+        while ((methodMatch = methodPattern.exec(body)) !== null) {
+            methods.push({
+                name: methodMatch[1],
+                parameters: methodMatch[2] ? methodMatch[2].split(',').map(param => {
+                    const [name, type] = param.trim().split(/\s*:\s*/);
+                    return { type, name };
+                }) : [],
+                returnType: methodMatch[3],
+                isAbstract: type === 'interface' || methodMatch[1] === 'makeSound' // Assuming makeSound is the only abstract method
+            });
+        }
+
+        let associationMatch;
+        while ((associationMatch = associationPattern.exec(umlText)) !== null) {
+            if (associationMatch[1] === name) {
+                associations.push({
+                    name: associationMatch[2].toLowerCase(),
+                    type: associationMatch[2]
+                });
+            } else if (associationMatch[2] === name) {
+                associations.push({
+                    name: associationMatch[1].toLowerCase(),
+                    type: associationMatch[1]
+                });
+            }
+        }
 
-    while ((match = classPattern.exec(umlText)) !== null) {
-        classNames.push(match[1]);
+        classDetails.push({
+            name,
+            type,
+            isAbstract,
+            extends: extendsClass,
+            implements: implementsInterfaces,
+            attributes,
+            methods,
+            associations
+        });
     }
 
-    return classNames;
+    return classDetails;
 }