How to write true color random (java) -

this code:

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import java.awt.*; import java.util.random;  import javax.swing.* public class graphspanetest {     public static void main(string[] args) {         myframe window = new myframe();     } } 

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class myframe extends jframe {     public myframe() {         mypanel panel = new mypanel();         container cont = getcontentpane();         cont.add(panel);         setbounds(100,100,500,500);         setvisible(true);     } } 

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class mypanel extends jpanel {     public void paintcomponent(graphics gr) {         super.paintcomponent(gr);          random ab = new random();          colors={color.blue, color.red, color.orange, color.pink}; //here error         int colorsthis = ab.nextint(colors[colorthis]); //here error         gr.setcolor(color.red); //i try it, does't work //and here error         int a=1;         while (a<10) {             random b = new random();              gr.fillrect(b.nextint(900+1),b.nextint(900+1), b.nextint(50+1), b.nextint(50+1));              a++;          }     } } 

i tried create code has square has random color @ random coordinate random bounds. have error. please help. know english bad.

this generate random colour rather predefined colour in array:

public color randomcolor() {         random r = new random();         float red, green, blue;         red = r.nextfloat();         green = r.nextfloat();         blue = r.nextfloat();         return new color(red, green, blue);     }