swing-examples/doc/31_painting.md

Painting

@Override
public void paint(Graphics g) {
    final Graphics2D graphics2D = (Graphics2D) g;
	
}

• component.paint(Graphics)
• paintComponent(Graphics) -> paintBorder(Graphics) -> paintChildren(Graphics)

Graphics2D

• drawString()

• drawImage()

• drawLine()

• drawArc() / drawRect() / drawOval() / drawPolygon()

• draw()

• fillArc() / fillRect() / fillOval() / fillPolygon()

• fill()

• rotate()

• scale()

• shear()

• translate()

Stroke

import java.awt.*;

Graphics2D graphics2D = (Graphics2D) g;
BasicStroke stroke = new BasicStroke(1.f,BasicStroke.CAP_BUTT,BasicStroke.JOIN_MITER,10.f,{10.f},0.f);
graphics2D.setStroke(stroke);

Join style

• JOIN_BEVEL
• JOIN_MITER
• JOIN_ROUND

End-cap style

• CAP_BUTT
• CAP_ROUND
• CAP_SQUARE

Paint

• Color, GradientPaint, TexturePaint

import java.awt.*;

Paint paint = new GradientPaint(x1,y1,color1,x2,y2,color2);
graphics2D.setPaint(paint);

AffineTransform

• AffineTransform.getRotateTransform()
• AffineTransform.getScaleTransform()
• AffineTransform.getShearTransform()
• AffineTransform.getTranslateTransform()