The constructor Date() is undefined

本文通过一个简单的Java示例说明了在使用日期类时容易犯的一个常见错误:将java.sql.Date误用为java.util.Date。这不仅导致了编译错误,还强调了正确引用Java标准库中不同日期类的重要性。

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import java.sql.Date;

public class Zuoy1 {
    public static void main(String[] args) {
        
        Date date = new Date();//错误The constructor Date() is undefined
        long l = date.getTime();
        System.out.println(l);
        
 会出现 这个错误是将包引错了      我引的是import java.sql.Date,其实应该是import java.util.Date

/*! * jQuery JavaScript Library v1.12.4 * http://jquery.com/ * * Includes Sizzle.js * http://sizzlejs.com/ * * Copyright jQuery Foundation and other contributors * Released under the MIT license * http://jquery.org/license * * Date: 2016-05-20T17:17Z */ (function( global, factory ) { if ( typeof module === "object" && typeof module.exports === "object" ) { // For CommonJS and CommonJS-like environments where a proper `window` // is present, execute the factory and get jQuery. // For environments that do not have a `window` with a `document` // (such as Node.js), expose a factory as module.exports. // This accentuates the need for the creation of a real `window`. // e.g. var jQuery = require("jquery")(window); // See ticket #14549 for more info. module.exports = global.document ? factory( global, true ) : function( w ) { if ( !w.document ) { throw new Error( "jQuery requires a window with a document" ); } return factory( w ); }; } else { factory( global ); } // Pass this if window is not defined yet }(typeof window !== "undefined" ? window : this, function( window, noGlobal ) { // Support: Firefox 18+ // Can't be in strict mode, several libs including ASP.NET trace // the stack via arguments.caller.callee and Firefox dies if // you try to trace through "use strict" call chains. (#13335) //"use strict"; var deletedIds = []; var document = window.document; var slice = deletedIds.slice; var concat = deletedIds.concat; var push = deletedIds.push; var indexOf = deletedIds.indexOf; var class2type = {}; var toString = class2type.toString; var hasOwn = class2type.hasOwnProperty; var support = {}; var version = "1.12.4", // Define a local copy of jQuery jQuery = function( selector, context ) { // The jQuery object is actually just the init constructor 'enhanced' // Need init if jQuery is called (just allow error to be thrown if not included) return new jQuery.fn.init( selector, context ); }
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