【发布时间】：2014-03-06 23:41:41
【问题描述】：
我目前正在尝试使用四个面板制作程序。使用 GridLayout 在 JFrame 的左侧将三个面板组合在一起，最后一个面板占据屏幕的右侧。理想情况下，左侧面板将占据 JFrame 左侧的 2/3，最后三分之一将由第四个面板占据。我试图以多种方式做到这一点，但无法弄清楚。当前显示器将屏幕一分为二，黄色、红色、蓝色相互叠加显示，但只有 540 像素长，而绿色覆盖了左侧面板的其余部分。
这有代表最后一个面板的绿色矩形，它与应该是 720 像素长的黄色红色和蓝色矩形重叠。我已经通过重新调整 JFrame 的大小来正确显示我想要的方式，直到我让它工作为止。通过重新调整大小直到矩形对齐，我设法让它看起来像它应该的那样。我移动了 JFrame 的右侧，直到两个各自的面板对齐，没有空白或重叠，不幸的是，为了做到这一点，侧面有大量多余的空白。
这是我用来制作此显示的代码。我是一个完全的摇摆新手，可能完全做错了。我不打算使用 GridLayout，我只是想让它正常工作。
import java.awt.*;
import javax.swing.*;
class testJPanel1 extends JPanel //topLeft
{
int x,y;
//JPanel Tjp1;
public testJPanel1()
{
x=720;
y=250;
setSize(x,y);
setVisible(true);
}
@Override
public void paintComponent(Graphics g)
{
super.paintComponent(g);
//g.fillOval(x,y,50,50);
g.setColor(Color.yellow);
g.fillRect(0, 0, x, y);
g.setColor(Color.black);
g.drawString("1",x,y);
System.out.println("Hey 1 works");
}
}
class testJPanel2 extends JPanel //mid left
{
int x,y;
public testJPanel2()
{
x=720;
y=260;
setVisible(true);
setSize(x,y);
}
@Override
public void paintComponent(Graphics g)
{super.paintComponent(g);
//g.fillOval(x,y,50,50);
g.setColor(Color.red);
g.fillRect(0, 0, x, y);
g.setColor(Color.black);
g.drawString("2",x,y);
System.out.println("Hey 2 works");
}
}
class testJPanel3 extends JPanel //bot left
{
int x,y;
int boundsx;
int boundsy;
public testJPanel3()
{
x=720;
y=250;
boundsx=200;
boundsy=200;
setVisible(true);
setSize(x,y);
}
@Override
public void paintComponent(Graphics g)
{
super.paintComponent(g);
//g.fillOval(x,y,50,50);
g.setColor(Color.blue);
g.fillRect(0, 0, x, y);
g.setColor(Color.black);
g.drawString("3",x,y);
System.out.println("Hey 3 works");
// g.drawRect(0,0,boundsx,boundsy);
}
}
class testJPanel4 extends JPanel //BIG one on the right
{
int x,y;
int boundsx;
int boundsy;
public testJPanel4()
{
x=360;
y=760;
boundsx=200;
boundsy=200;
setVisible(true);
setSize(x,y);
}
@Override
public void paintComponent(Graphics g)
{
super.paintComponent(g);
g.setColor(Color.green);
//g.fillOval(x,y,50,50);
g.fillRect(0,0,x,y);
g.setColor(Color.black);
g.drawString("4",x,y);
System.out.println("Hey 4 works");
//g.drawRect(0,0,boundsx,boundsy);
}
}
class Left_Panel extends JPanel //Combines 1 and 2 and 3
{
testJPanel1 tjp1;
testJPanel2 tjp2;
testJPanel3 tjp3;
public Left_Panel()
{
setLayout(new GridLayout(3,1));
tjp1= new testJPanel1();
tjp2= new testJPanel2();
tjp3= new testJPanel3();
add(tjp1);
add(tjp2);
add(tjp3);
}
}
class combo_Panel extends JPanel //combines left and right panels together
{
Left_Panel lp;
testJPanel4 tjp4;
//GOAL IS TO MAKE THIS PANEL lp is 720,760 pixels and tjp4 360,760...still doesnt work
public combo_Panel()
{
setLayout(new GridLayout(1,2)); //HOW TO make this work the way i want it or use something else i want
lp= new Left_Panel();
lp.setSize(720,760);
tjp4= new testJPanel4();
tjp4.setSize(360,760);
add(lp);
add(tjp4);
}
}
class Paint_Window extends JFrame
{
combo_Panel combo;
Paint_Window(String title)
{
super(title);
//setLayout( new BoxLayout(combo,2));
combo = new combo_Panel();
setBounds(new Rectangle(1080,760));
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
//setLayout(new FlowLayout());
add(combo);
//add(tjp5);
//tjp1.repaint();
}
}
public class testJPanel
{
public static void main(String args[])
{
Paint_Window window = new Paint_Window("Make your choice");
}
【问题讨论】：
-
首先，不要乱用组件的 x/y 值，它们已经有布局管理器定义的位置概念
标签： java swing layout jpanel layout-manager