Question

帮忙看看下面swing里面的jlable和jtextfield为什么只显示一个 如图

package com.jee;
import java.awt.*;

import javax.swing.*;

public class Tianjia extends JFrame{
JLabel []jlabels;
JPanel []jpanels;
JPanel jp_center;
JPanel jPanel7;
JTextField []jTextField;
JButton jButton1,jButton2;
public static void main(String[] args) {
// TODO Auto-generated method stub
Tianjia tianjia=new Tianjia();
}
public Tianjia(){
jp_center=new JPanel();
jp_center.setLayout(new GridLayout(6, 2));
jlabels=new JLabel[]{
new JLabel("学号"),
new JLabel("姓名"),
new JLabel("性别"),
new JLabel("年龄"),
new JLabel("系别"),
new JLabel("籍贯")
};
//
//

int size=6;
jpanels=new JPanel[size];
for(int i=0;i<jpanels.length;i++)
{
jpanels[i]=new JPanel();
}

jPanel7=new JPanel();

jTextField=new JTextField[size];
for(int i=0;i<jTextField.length;i++)
{
jTextField[i]=new JTextField(10);
}
//jTextField=new JTextField(8);

jButton1=new JButton("添加");
jButton2=new JButton("取消");

for(int i=0;i<jpanels.length;i++){
jpanels[i].add(jlabels[i],BorderLayout.CENTER);
jpanels[i].add(jTextField[i],BorderLayout.CENTER);
}
for (int j = 0; j <jpanels.length; j++) {
this.add(jpanels[j]);
}
jPanel7.add(jButton1);
jPanel7.add(jButton2);
this.add(jPanel7,BorderLayout.SOUTH);

this.setVisible(true);
this.setBounds(50,250,300,200);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setTitle("添加学生信息");

}
}

Answer 1

package com.jee;

import java.awt.*;

import javax.swing.*;

public class Tianjia extends JFrame{

JLabel []jlabels;

JPanel []jpanels;

JPanel jp_center;

JPanel jPanel7;

JTextField []jTextField;

JButton jButton1,jButton2;

public static void main(String[] args) {

// TODO Auto-generated method stub

Tianjia tianjia=new Tianjia();

}

public Tianjia(){

jp_center=new JPanel();

jp_center.setLayout(new GridLayout(6, 2));

jlabels=new JLabel[]{

new JLabel("学号"),

new JLabel("姓名"),

new JLabel("性别"),

new JLabel("年龄"),

new JLabel("系别"),

new JLabel("籍贯")

};

//

//

int size=6;

jpanels=new JPanel[size];

for(int i=0;i<jpanels.length;i++)

{

jpanels[i]=new JPanel();

}

jPanel7=new JPanel();

jTextField=new JTextField[size];

for(int i=0;i<jTextField.length;i++)

{

jTextField[i]=new JTextField(10);

}

//jTextField=new JTextField(8);

jButton1=new JButton("添加");

jButton2=new JButton("取消");

for(int i=0;i<jpanels.length;i++){

jpanels[i].add(jlabels[i],BorderLayout.CENTER);

jpanels[i].add(jTextField[i],BorderLayout.CENTER);

}

/**

*这里加了一句，Jframe默认是border布局，现在设置为flow布局，当然你可以设置为其他布局

*/

this.setLayout(new FlowLayout());

for (int j = 0; j <jpanels.length; j++) {

this.add(jpanels[j]);

}

jPanel7.add(jButton1);

jPanel7.add(jButton2);

this.add(jPanel7,BorderLayout.SOUTH);

this.setVisible(true);

this.setBounds(50,250,300,200);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setTitle("添加学生信息");

}

}

Answer 2

你的空间出现了重叠现象，你最好是用网格布局，用流布局都比你这个好。

Answer 3

this.add(jpanels[j]);
所有的都加到一块了