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class-name"}},[s._v("CtClass")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("intType"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" ctClass"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 设置方法的访问修饰")]),s._v("\n        ctMethod"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("setModifiers")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Modifier")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("PUBLIC"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token 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punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 加载修改后的类")]),s._v("\n        ctClass"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("toClass")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 创建对象")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("User")]),s._v(" stu "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("new")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("User")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 获取calc方法")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Method")]),s._v(" dMethod "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("User")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getDeclaredMethod")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[s._v('"getAgeSum"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("new")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Class")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v("\n                "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("int")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("int")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 反射调用 方法")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Object")]),s._v(" result "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" dMethod"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("invoke")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("stu"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("10")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("20")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("System")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("out"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("println")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("result"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n")])]),s._v(" "),a("div",{staticClass:"line-numbers-wrapper"},[a("span",{staticClass:"line-number"},[s._v("1")]),a("br"),a("span",{staticClass:"line-number"},[s._v("2")]),a("br"),a("span",{staticClass:"line-number"},[s._v("3")]),a("br"),a("span",{staticClass:"line-number"},[s._v("4")]),a("br"),a("span",{staticClass:"line-number"},[s._v("5")]),a("br"),a("span",{staticClass:"line-number"},[s._v("6")]),a("br"),a("span",{staticClass:"line-number"},[s._v("7")]),a("br"),a("span",{staticClass:"line-number"},[s._v("8")]),a("br"),a("span",{staticClass:"line-number"},[s._v("9")]),a("br"),a("span",{staticClass:"line-number"},[s._v("10")]),a("br"),a("span",{staticClass:"line-number"},[s._v("11")]),a("br"),a("span",{staticClass:"line-number"},[s._v("12")]),a("br"),a("span",{staticClass:"line-number"},[s._v("13")]),a("br"),a("span",{staticClass:"line-number"},[s._v("14")]),a("br"),a("span",{staticClass:"line-number"},[s._v("15")]),a("br"),a("span",{staticClass:"line-number"},[s._v("16")]),a("br"),a("span",{staticClass:"line-number"},[s._v("17")]),a("br"),a("span",{staticClass:"line-number"},[s._v("18")]),a("br"),a("span",{staticClass:"line-number"},[s._v("19")]),a("br"),a("span",{staticClass:"line-number"},[s._v("20")]),a("br"),a("span",{staticClass:"line-number"},[s._v("21")]),a("br"),a("span",{staticClass:"line-number"},[s._v("22")]),a("br"),a("span",{staticClass:"line-number"},[s._v("23")]),a("br")])]),a("h3",{attrs:{id:"_3-3-动态创建类"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#_3-3-动态创建类"}},[s._v("#")]),s._v(" 3.3 动态创建类")]),s._v(" "),a("div",{staticClass:"language-java line-numbers-mode"},[a("pre",{pre:!0,attrs:{class:"language-java"}},[a("code",[s._v("        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 类库池, jvm中所加载的class")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("ClassPool")]),s._v(" pool "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("ClassPool")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getDefault")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 创建一个学校类")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("CtClass")]),s._v(" schoolClass "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" pool"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("makeClass")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[s._v('"com.example.test.School"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 设置为公有类")]),s._v("\n        schoolClass"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("setModifiers")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Modifier")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("PUBLIC"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 获取String类型")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("CtClass")]),s._v(" stringClass "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" pool"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("get")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[s._v('"java.lang.String"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 获取list类型")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("CtClass")]),s._v(" listClass "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" pool"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("get")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[s._v('"java.util.List"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 获取学生的类型")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("CtClass")]),s._v(" userClass "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" pool"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("get")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[s._v('"com.example.test.User"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 给学校添加一个校名属性")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("CtField")]),s._v(" nameField "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("new")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("CtField")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("stringClass"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v('"schoolName"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" schoolClass"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        nameField"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("setModifiers")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Modifier")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("PUBLIC"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        schoolClass"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("addField")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("nameField"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 给学校添加一个学生集合")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("CtField")]),s._v(" studentList "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("new")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("CtField")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("listClass"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v('"users"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" schoolClass"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        studentList"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("setModifiers")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Modifier")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("PUBLIC"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        schoolClass"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("addField")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("studentList"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 给学校一个空构造")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("CtConstructor")]),s._v(" ctConstructor "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("CtNewConstructor")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("make")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[s._v('"public School() "')]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("+")]),s._v("\n                "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v('"{this.schoolName=\\"湖畔小学\\";this.users = new java.util.ArrayList();}"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" schoolClass"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n        schoolClass"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("addConstructor")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("ctConstructor"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 给学校一个addUser的方法")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("CtMethod")]),s._v(" m "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("new")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("CtMethod")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("CtClass")]),a("span",{pre:!0,attrs:{class:"token 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