JLabel 的一个小问题
package jrc;
import java.awt.*;
import javax.swing.*;
public class JavaInfo extends JFrame{
JPanel panel;
GridBagLayout gbl;
GridBagConstraints gbc;
JLabel lblArray[];
JTextField txtArray[];
String sPop[] = {
"path.separator",
"file.separator",
"file.encoding",
"java.vm.version",
"java.class.version",
"os.arch",
"sun.cpu.isalist",
"os.name",
"os.version",
"user.name",
"user.home",
"user.dir",
"java.class.path"
};
String sLbl[] = {
"路径分隔符",
"文件分隔符",
"文件编码格式",
"虚拟机版本",
"操作系统架构",
"CPU相关信息",
"操作系统名称",
"操作系统版本",
"登陆用户名称",
"登陆用户目录",
"系统当前目录",
"类搜索路径"
};
public JavaInfo(){
super("使用标签,文本框数组及网格袋布局来创建界面");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
panel = new JPanel();
gbl = new GridBagLayout();
gbc = new GridBagConstraints();
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.fill = GridBagConstraints.NONE;
panel.setLayout(gbl);
lblArray = new JLabel[13];
txtArray = new JTextField[13];
for(int i = 0;i < 13;i++){
//lblArray[i] = new JLabel(sLbl[i]);这句话调试的时候有问题,不解
addControls(i+1,1,lblArray[i]);
txtArray[i] = new JTextField(System.getProperty(sPop[i]),40);
addControls(i+1,2,txtArray[i]);
}
getContentPane().add(panel);
pack();
setVisible(true);
}
public void addControls(int iRow,int iCol,Component c){
gbc.gridy = iRow;
gbc.gridx = iCol;
gbl.setConstraints(c,gbc);
panel.add(c);
}
public static void main(String[] args){
JavaInfo s = new JavaInfo();
}
}
有注释的哪一行不懂
那位能解释下,谢谢!!!