response.setContentLength(buf.length);
out.flush();
out.close();
}
private int fun(char[] rands){
int num1=Integer.parseInt(rands[0]+"")*10+Integer.parseInt(rands[1]+"");
int num2=Integer.parseInt(rands[2]+"");
int num=0;
if(rands[2]=='+'){
num=num1+num2;
}else{
num=num1-num2;
}
return num;
}
private void drawRands(Graphics g, char[] rands) {
g.setColor(Color.black);
g.setFont(new Font(null,Font.ITALIC|Font.BOLD,18));
g.drawString(" "+rands[0],1,20);
g.drawString(" "+rands[1],14,17);
g.drawString(" "+rands[3],30,16);
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