![](/img/trans.png)
[英]How do you find out the height and width of a PFont string in Processing or Java?
[英]How do you draw a String or Rectangle according to the screens width and Height with a Canvas in Java
我想知道如何繪制字符串或矩形(JFrame 完全處於全屏狀態)
這是我的 Main.java 類中的內容:
public static int WIDTH, HEIGHT;
private Window window;
...
public Main() {
window = new Window("2D Shooter", this);
...
private void render(){
BufferStrategy bs = this.getBufferStrategy();
if(bs == null){
this.createBufferStrategy(3);
return;
}
Graphics g = bs.getDrawGraphics();
g.setColor(Color.BLACK);
g.fillRect(0, 0, WIDTH, HEIGHT);
handler.render(g);//this calls the render method to render objects
g.dispose();
bs.show();
}
后來在另一個班級我有:
public void render(Graphics g){
...
g.setColor(Color.WHITE);
g.drawString("2D Shooter", ((Main.WIDTH)/2), (Main.HEIGHT/5));
...
}
此代碼有效並運行,但文本並未完全居中,我希望它居中居中而不是居中。 謝謝你!
使用圖形上下文的FontMetrics
。
String s = "2D Shooter";
int w2 = g.getFontMetrics().stringWidth(s) / 2;
int h2 = g.getFontMetrics().getHeight();
g.drawString(s, getWidth() / 2 - w2, h2);
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
* @see http://stackoverflow.com/a/37150783/230513
*/
public class Test {
private void display() {
JFrame f = new JFrame("Test");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new JPanel() {
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.setFont(getFont().deriveFont(Font.BOLD, 24f));
String s = "2D Shooter";
int w2 = g.getFontMetrics().stringWidth(s) / 2;
int h2 = g.getFontMetrics().getHeight();
g.drawString(s, getWidth() / 2 - w2, h2);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(320, 240);
}
});
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Test()::display);
}
}
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