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我想写一个代码,使用“控制台”类及其方法,并没有别的 ... 代码编译正确,但有一个错误,我不明白显示java.lang.NullPointerException错误
package ronnie;
import java.io.Console;
public class Ronnie
{
public static void main(String[] args)
{
Console console = System.console();
console.printf("Hello");
}
}
运行:
Exception in thread "main" java.lang.NullPointerException
at ronnie.Ronnie.main(Ronnie.java:8)
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)