scrolltext.java

java applet 非常全的实例。比较利于初学者进行研究。

import java.awt.*;

public class ScrollText 
{
  private Dimension position;
  private int x=10,y=10;
  private int totalLine=1;
  private String text[];
  private Graphics g;
  private Font font;
  private Color back=Color.black,fore=Color.white;
  private Rectangle r;
  
  public ScrollText()
  {
    totalLine = 1;
  }
  
  public ScrollText(Graphics gra)
  {
    g = gra;
    r = g.getClipBounds();
  }
  
  public void setLines(int L)
  {
    totalLine = L;
    text = new String[totalLine];
  }
  
  public int getLines()
  {
    return totalLine;
  }
  
  public void show()
  {
    g.setColor(fore);
    for(int i=0,a,b; i<text.length; i++)
    {
      
      a  = x;
      b = y+(i+1)*20;
      g.drawString(text[i],a,b);
    }
  }
  
  public void setForeground(Color c)
  {
    fore = c;
  }
  
  public Color getForeground()
  {
    return fore;
  }
  
  public void setBackground(Color c)
  {
    back = c;
  }
  
  public Color getBackground()
  {
    return back;
  }
  
  //========================================
  
  public int getX()
  {
    return x;
  }
  
  public void setX(int x)
  {
    this.x = x;
  }
  
  public void setPosition(int x, int y)
  {
    this.x = x;
    this.y = y;
  }
  
  public int getY()
  {
    return y;
  }
  
  public void setY(int y)
  {
    this.y = y;
  }
  
  //========================================
  
  public void setText(int index, String s)
  {
    text[index] = s ;
  }
  
}