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Java Swing - 如何垂直将顶部与JPanel中新行中的每个元素对齐...

layout 【layout】
我们想知道如何垂直将顶部与JPanel中新行中的每个元素对齐。...
代码展示 运行结果 
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;

public class Main extends JFrame {
  public Main() {
    GridBagLayout layout = new GridBagLayout();
    GridBagConstraints constraints = new GridBagConstraints();
    getContentPane().setLayout(layout);
    constraints.anchor = GridBagConstraints.WEST;
    JLabel l1 = new JLabel("First Name:");
    constraints.gridx = 0;
    constraints.gridy = 0;
    constraints.gridwidth = 1;
    constraints.gridheight = 1;
    constraints.weightx = 0;
    constraints.weighty = 0;
    constraints.fill = GridBagConstraints.BOTH;
    constraints.insets = new Insets(5, 5, 5, 5);
    layout.setConstraints(l1, constraints);
    getContentPane().add(l1);

    JTextField t1 = new JTextField();
    constraints.gridx = 1;
    constraints.gridy = 0;
    constraints.weightx = 1;
    constraints.fill = GridBagConstraints.HORIZONTAL;
    constraints.insets = new Insets(5, 5, 5, 5);
    layout.setConstraints(t1, constraints);
    getContentPane().add(t1);

    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setSize(700, 500);
  }

  public static void main(String[] args) {
    new Main().setVisible(true);
  }
}