Eclipse java graphics issues -

i working in eclipse on creating canvas can draw lines or on it, simple program, know. have created canvas class, cartesiancoordinate class, , main class. have created method draw line of specified color on canvas created, whenever try enter color, told wrong. i've checked , seems right, if me i'd appreciative! here's code:

import java.awt.color;  public class lab { public static void main(string [ ] args){      cartesiancoordinate mycoordinate;     mycoordinate = new cartesiancoordinate(300, 400);      mycoordinate.getx();     mycoordinate.gety();      system.out.printf("the coordinates are: (%s)", mycoordinate.tocoord());      canvas mycanvas = new canvas(800, 600);      mycanvas.drawlinebetweenpoints(400, 500, green);    }  }       public class cartesiancoordinate {  private int xposition; private int yposition;  public cartesiancoordinate(int startingx, int startingy){     this.xposition = startingx;     this.yposition = startingy; }     public int getx() {         return this.xposition;     }      public int gety() {         return this.yposition;     }     public string tocoord(){         return string.format("%02d, %02d", getx(), gety());     }  }        import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.util.arraylist; import java.util.list; import java.util.collections; import java.awt.geom.line2d;    public class canvas extends jpanel {  private int xsize, ysize; private jpanel panel; private string frametitle; private list<ls> lines; private final static int default_x = 800; private final static int default_y = 600;   public canvas() {     this(default_x, default_y); }   public canvas(int x, int y) {     xsize = x;     ysize = y;     frametitle = "canvas";     lines = collections.synchronizedlist(new arraylist<ls>());     setupcanvas(); }  private void setupcanvas() {      jframe frame = new jframe("my basic gui");     frame.setdefaultcloseoperation(jframe.exit_on_close);     frame.add(this);     frame.pack();     frame.setvisible(true); }   public dimension getpreferredsize() {     return new dimension(this.xsize, this.ysize); }   public void paintcomponent(graphics g) {     super.paintcomponent(g);      graphics2d g2 = (graphics2d) g;      g2.setrenderinghint(renderinghints.key_antialiasing, renderinghints.value_antialias_on);  // smoother lines     g2.setstroke(new basicstroke(3));      synchronized(lines) {         (ls line : lines) {             g2.setcolor(line.getcolor());             g2.draw(new line2d.float(line.getstartx(), line.getstarty(),                         line.getendx(), line.getendy()));         }     } }   public void drawlinebetweenpoints(cartesiancoordinate startpoint, cartesiancoordinate endpoint, string color) {     lines.add(new ls(startpoint.getx(), startpoint.gety(),                                endpoint.getx(), endpoint.gety(),                               this.parsecolour(color)));      repaint(); }   public void drawlinesegment(linesegment line, string color) {       lines.add(new ls(line.getstartpoint().getx(), line.getstartpoint().gety(),                       line.getendpoint().getx(), line.getendpoint().gety(),                      this.parsecolour(color)));     repaint(); }   public void drawlinesegments(linesegment [] linesegments, string color) {     (linesegment l : linesegments) {         lines.add(new ls(l.getstartpoint().getx(), l.getstartpoint().gety(),                           l.getendpoint().getx(), l.getendpoint().gety(),                          this.parsecolour(color)));     }     repaint(); }   private color parsecolour(string colour) {     color drawcolor;      switch (colour.tolowercase()) {          case "white":             drawcolor = color.white;             break;         case "black":             drawcolor = color.black;             break;         case "blue":             drawcolor = color.blue;             break;         case "cyan":             drawcolor = color.cyan;             break;         case "gray":             drawcolor = color.gray;             break;         case "darkgray":             drawcolor = color.dark_gray;             break;         case "lightgray":             drawcolor = color.light_gray;             break;         case "green":             drawcolor = color.green;             break;         case "magenta":             drawcolor = color.magenta;             break;         case "red":             drawcolor = color.red;             break;         case "orange":             drawcolor = color.orange;             break;         case "yellow":             drawcolor = color.yellow;             break;         default:             system.out.println("unknown colour '" + colour + "', defaulting        black.");             drawcolor = color.black;             break;     }       return drawcolor; }    public void removemostrecentline() {     this.lines.remove(this.lines.size()-1); }    public void clear() {     lines.clear();     repaint(); }   private class ls {     private int startx, starty, endx, endy;     private color color;       public ls(int startx, int starty, int endx, int endy, color c) {         this.startx = startx;         this.starty = starty;         this.endx = endx;         this.endy = endy;         this.color = c;     }       public int getstartx() {         return this.startx;     }      public color getcolor() {         return this.color;     }       public int getstarty() {         return this.starty;     }       public int getendx() {         return this.endx;     }       public int getendy() {         return this.endy;     } } } 

according eclipse, when type "mycanvas.drawlinebetweenpoints(400, 500, green)", says doesn't recognise color specified. have tried many colors included in canvas class, , still says same. missing here? if am, please direct me towards error is? , please don't it's because eclipse bad, it's not helpful. thank you.