如何将两个jpanels并排放置

如果我正确理解了您的问题，则希望并排放置2个JPanel。查看布局GridLayout。

您需要setLayout（new GridLayout（1,2））; 上面写着1 Row，2 Col

package SSCCE;import java.awt.BorderLayout;import java.awt.Color;import java.awt.GridLayout;import javax.swing.Jframe;import javax.swing.JLabel;import javax.swing.JPanel;public class SideBYSide extends Jframe{    public static void main(String[] args) {        new SideBYSide();    }    public SideBYSide(){        this.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE);        this.setSize(100, 75);        this.setLayout(new BorderLayout());        this.setVisible(true);        JPanel container = new JPanel();        JPanel panelOne = new JPanel();        JPanel panelTwo = new JPanel();        panelOne.add(new JLabel("1"));        panelTwo.add(new JLabel("2"));        container.setLayout(new GridLayout(1,2));        container.add(panelOne);        container.add(panelTwo);        this.add(container);    } }