functionexecute(){'use strict';functionconcat(str1,str2){// the strict mode is enabled tooconsole.log(this===undefined);// => truereturnstr1+str2;}console.log(this===undefined);// => true// concat() is invoked as a function in strict mode// this in concat() is undefinedconcat('...
AI代码解释 functionf2(){"use strict";// 这里是严格模式returnthis;}f2()===undefined;// truewindow.f2()===window;//true f2()被调用时,this 应是 undefined。 因为f2 是被直接调用的,而不是作为对象的属性或方法调用的(如 window.f2())。有一些浏览器最初在支持严格模式时没有正确实现这个功能,于...
This easy to use Java Swing font chooser component allows users to select a font by selecting a font family name and the installed font variants. - dheid/fontchooser
Build Android/Java files from source during a Rust compilation process. Use this in your `build.rs` build script. - project-robius/android-build
//: Leaf.java// Simple use of the "this" keywordpublicclassLeaf{privateinti=0; Leafincrement(){ i++;returnthis; }voidprint(){ System.out.println("i = "+ i); }publicstaticvoidmain(String[] args){Leafx=newLeaf(); x.increment().increment().increment().print(); ...
Spring Boot version 2.2.X and below will enable JMX by default, you can use jconsole to view it, and if we don't need these monitoring, we can manually turn it off. spring.jmx.enabled=false Turn off layered compilation For versions after Java8, multi-layer compilation is turned on by ...
SonarQube在扫描到这段代码时,会提示关闭文件流:Use try-with-resources or close this "FileInputStream" in a "finally" clause. 我们用try-with-resources语法糖的方式来改进这段代码,try-with-resouces相当于显式在finally块里调用close方法(从build后的.class文件可以看出来)。为了保证资源及时关闭,我们往往要...
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To refer to the Point field x, the constructor must use this.x. Using this with a Constructor From within a constructor, you can also use the this keyword to call another constructor in the same class. Doing so is called an explicit constructor invocation. Here's another Rectangle class, ...
Use try-with-resources or close this "BufferedOutputStream" in a "finally" clause. 解决方法: 在finally中关闭FileInputStream,主要是关闭方式不对,finally代码块中,应该要对每个stream进行单独关闭,而不能统一写在一个try-catch代码中。 A NullPointerException might be thrown as ‘XXX’ is nullable here...