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How to create classes and objects in JShell in Java 9?

Aug 31, 2023 am 11:25 AM

在Java 9的JShell中如何创建类和对象?

JShell是在Java 9中发布的一种新的Java shell工具。它是第一个官方的REPLRead-Evaluate-Print-Loop)应用程序。该工具有助于执行和评估简单的Java程序和逻辑,例如语句循环表达式等等。Java REPL在命令提示符下提供了一个简单的编程环境。它可以读取输入、评估它并打印输出。

在下面的示例中,我们可以使用命令提示符在JShell中创建一个类和对象。

示例

<strong>jshell&gt; class Employee {
...&gt; private String name;
...&gt;    Employee(String name) {
...&gt;       this.name=name;
...&gt;    }
...&gt;    String getName() {
...&gt;       return name;
...&gt;    }
...&gt;    void setName(String name) {
...&gt;       this.name=name;
...&gt;    }
...&gt; }
| created class Employee</strong>
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示例

<strong>jshell&gt; Employee emp = new Employee(&quot;Adithya&quot;)
emp ==&gt; Employee@4b952a2d

jshell&gt; emp.getName()
$3 ==&gt; &quot;Adithya&quot;</strong>
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