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老师,为啥我点击创建新项目的时候它出现的这个界面和视频中出现的界面不一样
public class TestYichu{ public static void main(String[] args){ int money =1000000000; int years=20; int total=money*years; System.out.println(total); int total1=1L*money*years; System.out.println(total1); int total2=money*((long)years); System.out.println(total2); }
老师,我这个哪里错了
老师,想问下 Student friend
这个代码是生成对象吗?以类名作为变量是什么意思,我自己跑了代码初始化为null
com.bjxtjava.awt.*java.awt.event.WindowAdapterjava.awt.event.WindowEventMyGameFrame Frame { () { .setTitle().setVisible().setSize().setLocation().addWindowListener(WindowAdapter() { (WindowEvent e) { System.()} }) } (Graphics g) { g.drawLine()g.drawRect()g.drawOval()g.setColor(Color.)} (String[] args) { MyGameFrame frame= MyGameFrame()frame.LaunchFrame()} }
com.bjxtjava.awt.*java.awt.event.WindowAdapterjava.awt.event.WindowEventMyGameFrame Frame { () { .setTitle().setVisible().setSize().setLocation().addWindowListener(WindowAdapter() { (WindowEvent e) { System.()} }) } (Graphics g) { g.drawLine()g.drawRect()g.drawOval()g.setColor(Color.)} (String[] args) { MyGameFrame frame= MyGameFrame()frame.LaunchFrame()} }
为啥没有显示画的线图形
System.out.println("total2="+total2);
老师看一下怎么回事?重新改一遍也不行