对大家有帮助的问答会被标记为“推荐”,看完课程过来浏览一下别人提的问题,会帮你学得更全面
public class TestInt{ public static void main(String[] args){ int a=100; //十进制 int b=015; //八进制 int c=0xff; //十六进制 int d=0b1001010101; //二进制 System.out println(a); System.out.println(b); System.out.println(c); System.out.println(d); } }
老师好,为什么我跟着视频里打会这样报错呢?(";"是英文类型的)
老师我想问下定义类的时候有时是public static void main ,有时候是static void ,有时候是public void,想问一下为什么
class Point {
double x, y;
public Point(double _x, double _y) {
x = _x;
y = _y;
}
public double getDistance(Point p) {
return Math.sqrt((x - p.x) * (x - p.x) + (y - p.y) * (y - p.y));
}
public static void main(String[ ] args) {
Point p1 = new Point(3.0, 4.0);
Point origin = new Point(0.0, 0.0);
System.out.println(p1.getDistance(origin));
}
}
这行代码Point p1 = new Point(3.0, 4.0);,中的point是这个point类还是这个构造方法
TestSuper2 { (String[] args) { System..println()ChildClass02()} } FatherClass02{ fatherClass02{ System..println()} } ChildClass02 FatherClass02{ ChildClass02{ System..println()} }
为什么不之间用Random呢?Random和Math.random之间的区别是什么?精度吗?
TestFangFa { (String[] args) { ()()()()} (FenZhongYuexin){ a =()(Yuexin/)(FenZhong<){ System..println(+FenZhong++)}(FenZhong<){ System..println(+FenZhong++)}(FenZhong<){ System..println(+FenZhong++)}(FenZhong<){ System..println(+FenZhong+++a/+)}{ System..println(+FenZhong+++a+)} Yuexin} }
TestFangFa { (String[] args) { ()()()()} (FenZhongYuexin){ a =()(Yuexin/)(FenZhong<){ System..println(+FenZhong++)}(FenZhong<){ System..println(+FenZhong++)}(FenZhong<){ System..println(+FenZhong++)}(FenZhong<){ System..println(+FenZhong+++a/+)}{ System..println(+FenZhong+++a+)} Yuexin} }