robin.won

#include using namespace std;void Permutations(char *array,const int k,const int m){ if(k==m) { for(int i=0;i<=m;i++) cout<<array[i]<<""; cout<<endl; } else{ for(int i=k;i<=m;i++) { swap(array[k],array[i]); Permutations(array,k+1,m); swap(array[k],array[i]); } }}int Read More

Panel可以实现ImageObserver接口，所以Panel类后添加“implements ImageObserver”，在Panel的构造方法中初始化Buffer Image对象，然后在Paint语句中添加Graphics的DrawImage方法，其Observer参数为this。实例如下：class MyPanel extends JPanel implements MouseListener, ImageObserver { BufferedImage bi; private static final long serialVersionUID = 1L; public MyPane Read More

1. 在paint中new BufferedImage;2. Graphics2D=bufferedimage.createGraphics();3. Graphics2D.draw;4. Graphics.drawImage. Read More