java后端实习生面试题
时间: 2023-08-25 22:16:30 浏览: 197
回答:对于Java后端实习生的面试题,以下是一个例子:
编程题:从10000到99999找到AABB类型的数字。
public class Test1 {
public static void main(String[] args) {
String str;
for (int i = 10000; i < 100000; i++) {
str = String.valueOf(i);
if (str.charAt(0) == str.charAt(1) && str.charAt(2) != str.charAt(1)
&& str.charAt(3) != str.charAt(2) && str.charAt(3) == str.charAt(4)) {
System.out.println(str);
}
}
}
}
在Java的面试中,可能会问到关于Java运行时环境(JRE)和Java开发工具包(JDK)之间的区别。JRE是Java运行程序所必须的,而JDK是Java程序的开发工具,包括Java编译器等,同时也包含了JRE。此外,Java虚拟机(JVM)是负责运行Java应用程序的,并且在代码执行次数超过一定阈值时,会使用即时编译(JIT)将Java字节码转换为本地代码,以提高性能。123
引用[.reference_title]
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