package bornthisway;import java.awt.*;import javax.swing.*;public class BornThisWay extends JFrame { public Container container = null; JLabel soil=new JLabel(); public BornThisWay() { this.setTitle("test"); this.setSize(810, 510); setResizable(false); setLocationRelativeTo(null); container = this.getContentPane(); container.setLayout(null); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setVisible(true); soil.setBackground(Color.DARK_GRAY); soil.setText("0,250=============================================================================================================="); container.add(soil); soil.setSize(810, 10); soil.setLocation(0, 350); } public static void main(String[] args) { new BornThisWay(); }}我设置了soil背景色为灰色,可是运行没显示,为什么呢?
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