jsoop_封装

Posted 2020-10-15 Gold_Long

<script>
        //java.utils.ArrayList()
        
        //包（命名空间）
        /*
        var java = {};
        java.utils = {};
        java.utils.ArrayList = "asdfafsd";
        
        
        java.utils.ArrayList;
        */
        
        
        //
        (
        function(){
            var a = 5;
            var b = 100;
            window.c = 200;//把c暴露出去
            d = 300;//这行代码也可以做到公布
        }
        )();
        //console.log(c);
        
        var result = (function(m,n){
                return m + n;})(10,20);
        //console.log(result);
        
        function Person(){
            var age = 1;
            this.getAge = function(){
                return age ;
            }
            
            this.setAge = function(val){
                   age = val;
            }
        
        
        }
        var p = new Person();
        p.setAge(20);
        console.log(p.getAge());
        
        
        //Closure 闭包

        
        
    </script>