Swing画板直线和三角形

来源：互联网发布：软件测试的发展方向编辑：程序博客网时间：2024/05/01 08:23

运行 test.java

----------------------------------------------test.java--------------------------------------------------

package col.alex;

import java.awt.*;

import java.awt.event.*;

import java.util.*;

import javax.swing.*;

import javax.swing.plaf.FontUIResource;

public class Test extends JFrame implements ActionListener {

public static final Font f12 = new Font("宋体", Font.PLAIN, 12);

private static final int FRAME_WIDTH = 700;

private static final int FRAME_HEIGHT = 740;

JTextField tf1, tf2, tf3, tf4, tf5, tf6;

JRadioButton rbt;

Container mainPane;

JPanel northPane, centerPane, southPane;

JButton northLineButton, northRoundButton, northSanButton, northSMButton;

JPanel linePane, roundPane, sanPanel, SMPanel;

JTextField lineFieldx1, lineFieldx2, lineFieldy1, lineFieldy2, lineFieldx3,

lineFieldy3;

JTextField roundField, roundField2, roundField3;

JTextField SlineFieldx1, SlineFieldx2, SlineFieldy1, SlineFieldy2,

SlineFieldx3, SlineFieldy3;

// constructor

public Test() {

//setBackground(Color.pink);

init();

}

private void init() {

try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch (Exception e) {

e.printStackTrace(System.err);

}

setTitle("画图!");

setSize(FRAME_WIDTH, FRAME_HEIGHT);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

// setResizable(false);

initGlobalFontSetting(f12);

mainPane = getContentPane();

mainPane.setLayout(new BorderLayout());

mainPane.add(createNorthPane(false), BorderLayout.NORTH);

setVisible(true);

}

private void initGlobalFontSetting(Font fnt) {

FontUIResource fontRes = new javax.swing.plaf.FontUIResource(fnt);

Enumeration keys = UIManager.getDefaults().keys();

while (keys.hasMoreElements()) {

Object key = keys.nextElement();

Object value = UIManager.get(key);

if (value instanceof javax.swing.plaf.FontUIResource)

UIManager.put(key, fontRes);

}

private JPanel createNorthPane(boolean force) {

if (northPane == null || force) {

northSanButton = new JButton("画三角形");

northSanButton.addActionListener(this);

northLineButton = new JButton("画直线");

northLineButton.addActionListener(this);

northRoundButton = new JButton("画圆");

northRoundButton.addActionListener(this);

northSMButton = new JButton("使用说明！");

northSMButton.addActionListener(this);

northPane = new JPanel();

northPane.add(northSanButton);

northPane.add(northLineButton);

northPane.add(northRoundButton);

northPane.add(northSMButton);

}

return northPane;

}

private JPanel createSMPanel(boolean force) {

SMPanel = new JPanel();

return SMPanel;

}

private JPanel createRoundPanel(boolean force) {

if (roundPane == null || force) {

roundField = new JTextField(4);

roundField2 = new JTextField(4);

roundField3 = new JTextField(4);

JButton bt2 = new JButton("画圆");

bt2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent event) {

DrawRound dRound = new DrawRound(Integer

.parseInt(roundField.getText()), Integer

.parseInt(roundField2.getText()), Integer

.parseInt(roundField3.getText()));

dRound.setSize(400, 420);

updateMainPane(createNorthPane(false), dRound,

createRoundPanel(false));

DrawLine dLine2 = new DrawLine(10, 200, 500, 200);

}

});

roundPane = new JPanel();

roundPane.add(new JLabel("半径："));

roundPane.add(roundField);

roundPane.add(new JLabel("原点坐标："));

roundPane.add(new JLabel("O("));

roundPane.add(roundField2);

roundPane.add(new JLabel(", "));

roundPane.add(roundField3);

roundPane.add(new JLabel(") "));

roundPane.add(bt2);

}

return roundPane;

}

private JPanel createLinePane(boolean force) {

if (linePane == null || force) {

lineFieldx1 = new JTextField(4);

lineFieldy1 = new JTextField(4);

lineFieldx2 = new JTextField(4);

lineFieldy2 = new JTextField(4);

JButton bt = new JButton("画直线");

bt.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent event) {

DrawLine dLine = new DrawLine(Integer.parseInt(lineFieldx1

.getText()), Integer

.parseInt(lineFieldy1.getText()), Integer

.parseInt(lineFieldx2.getText()), Integer

.parseInt(lineFieldy2.getText()));

dLine.setSize(400, 420);

updateMainPane(createNorthPane(false), dLine,

createLinePane(false));

DrawLine dLine2 = new DrawLine(10, 200, 500, 200);

}

});

linePane = new JPanel();

linePane.add(new JLabel("直线的端点坐标："));

linePane.add(new JLabel("A("));

linePane.add(lineFieldx1);

linePane.add(new JLabel(", "));

linePane.add(lineFieldy1);

linePane.add(new JLabel(") "));

linePane.add(new JLabel("B("));

linePane.add(lineFieldx2);

linePane.add(new JLabel(", "));

linePane.add(lineFieldy2);

linePane.add(new JLabel(")"));

linePane.add(bt);

}

return linePane;

}

private JPanel createSanPane(boolean force) {

if (linePane == null || force) {

SlineFieldx1 = new JTextField(4);

SlineFieldy1 = new JTextField(4);

SlineFieldx2 = new JTextField(4);

SlineFieldy2 = new JTextField(4);

SlineFieldx3 = new JTextField(4);

SlineFieldy3 = new JTextField(4);

JButton bt1 = new JButton("画三角形");

bt1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent event) {

DrawSan dSan = new DrawSan(Integer.parseInt(SlineFieldx1

.getText()), Integer.parseInt(SlineFieldy1

.getText()), Integer.parseInt(SlineFieldx2

.getText()), Integer.parseInt(SlineFieldy2

.getText()), Integer.parseInt(SlineFieldx3

.getText()), Integer.parseInt(SlineFieldy3

.getText()));

dSan.setSize(400, 420);

updateMainPane(createNorthPane(false), dSan,

createSanPane(false));

DrawLine dSan2 = new DrawLine(10, 200, 500, 200);

}

});

sanPanel = new JPanel();

sanPanel.add(new JLabel("三顶点坐标："));

sanPanel.add(new JLabel("A("));

sanPanel.add(SlineFieldx1);

sanPanel.add(new JLabel(","));

sanPanel.add(SlineFieldy1);

sanPanel.add(new JLabel(") ;"));

sanPanel.add(new JLabel("B("));

sanPanel.add(SlineFieldx2);

sanPanel.add(new JLabel(", "));

sanPanel.add(SlineFieldy2);

sanPanel.add(new JLabel(") ;"));

sanPanel.add(new JLabel("C("));

sanPanel.add(SlineFieldx3);

sanPanel.add(new JLabel(","));

sanPanel.add(SlineFieldy3);

sanPanel.add(new JLabel(") ;"));

sanPanel.add(bt1);

}

return sanPanel;

}

public void actionPerformed(ActionEvent event) {

Object source = event.getSource();

if (source == northSanButton) {

drawSan();

} else if (source == northLineButton) {

drawLine();

} else if (source == northSMButton) {

drawSM();

} else if (source == northRoundButton)

drawRound();

}

private void drawSM() {

updateMainPane(createNorthPane(false), new JPanelSM(),

createSMPanel(true));

}

private void drawLine() {

updateMainPane(createNorthPane(false), new JPanelsan(),

createLinePane(true));

}

private void drawSan() {

updateMainPane(createNorthPane(false), new JPanelsan(),

createSanPane(true));

}

private void drawRound() {

updateMainPane(createNorthPane(false), new JPanelsan(),

createRoundPanel(true));

}

private void updateMainPane(JPanel north, JPanel center, JPanel south) {

mainPane.removeAll();

mainPane.add(north, BorderLayout.NORTH);

mainPane.add(center, BorderLayout.CENTER);

mainPane.add(south, BorderLayout.SOUTH);

mainPane.validate();

mainPane.repaint();

}

public static void main(String[] arg) {

Test test = new Test();

}

----------------------------------------------Localtion.java-------------------------------------------

package col.alex;

public class Location {

public int x;

public int y;

public Location(int x, int y) {

this.x = x;

this.y = y;

}

--------------------------------------------JPanelsan.java-------------------------------------------

package col.alex;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Graphics;

import javax.swing.JPanel;

public class JPanelsan extends JPanel {

public void paintComponent(Graphics g) {

super.paintComponent(g);

setBackground(Color.gray);

Dimension panelSize = this.getSize();

Location center = new Location(panelSize.width / 2,

panelSize.height / 2);

int radius = (int) ((Math.min(panelSize.width, panelSize.height) / 2) * 0.9);

int[] x = new int[2 * radius + 1];

int[] y = new int[2 * radius + 1];

g.setColor(Color.black);

// 画坐标轴

g.drawLine(0, center.y, 2 * center.x, center.y);// x

g.drawLine(center.x, 0, center.x, 2 * center.y);// y

for (int i = -center.x / 10; i < center.x / 10; i++) {

g.drawLine(center.x + 10 * i, center.y, center.x + 10 * i,

center.y - 2);// x

g.drawLine(center.x, center.y + 10 * i, center.x - 2, center.y + 10

* i);// y

}

g.drawLine(2 * center.x, center.y, 2 * center.x - 10, center.y - 10);

g.drawLine(2 * center.x, center.y, 2 * center.x - 10, center.y + 10);

g.drawLine(center.x, 0, center.x - 10, 10);

g.drawLine(center.x, 0, center.x + 10, 10);

g.drawPolyline(x, y, 2 * radius + 1);

g.setColor(Color.red);

g.setFont(new Font("ScanSerif", Font.BOLD, 12));

g.drawString("单位长度为：10个单位", 60, 60);

g.drawString("O", center.x - 10, center.y + 10);

g.drawString("X/" + center.x, 2 * center.x - 30, center.y - 50);

g.drawString("Y/" + center.y, center.x + 30, 30);

}

--------------------------------------------DrawLine.java-------------------------------------------

package col.alex;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Graphics;

import javax.swing.JPanel;

public class DrawLine extends JPanel {

int a, b, c, d, i;

DrawLine() {

}

DrawLine(int a, int b, int c, int d) {

this.a = a;

this.b = b;

this.c = c;

this.d = d;

}

public void paintComponent(Graphics g) {

super.paintComponent(g);

setBackground(Color.gray);

Dimension panelSize = this.getSize();

System.out.println(panelSize.width + " " + panelSize.height);

Location center = new Location(panelSize.width / 2,

panelSize.height / 2);

int radius = (int) ((Math.min(panelSize.width, panelSize.height) / 2) * 0.9);

int[] x = new int[2 * radius + 1];

int[] y = new int[2 * radius + 1];

g.setColor(Color.black);

// 画坐标轴

g.drawLine(0, center.y, 2 * center.x, center.y);// x

g.drawLine(center.x, 0, center.x, 2 * center.y);// y

for (int i = -center.x / 10; i < center.x / 10; i++) {

g.drawLine(center.x + 10 * i, center.y, center.x + 10 * i,

center.y - 2);// x

g.drawLine(center.x, center.y + 10 * i, center.x - 2, center.y + 10

* i);// y

}

g.drawLine(2 * center.x, center.y, 2 * center.x - 10, center.y - 10);

g.drawLine(2 * center.x, center.y, 2 * center.x - 10, center.y + 10);

g.drawLine(center.x, 0, center.x - 10, 10);

g.drawLine(center.x, 0, center.x + 10, 10);

g.drawPolyline(x, y, 2 * radius + 1);

g.setColor(Color.red);

g.setFont(new Font("ScanSerif", Font.BOLD, 12));

g.drawString("单位长度为：10个单位", 60, 60);

g.drawString("A点坐标:（" + a + "," + b + ")", 60, 90);

g.drawString("B点坐标:（" + c + "," + d + ")", 60, 120);

g.drawString("O", center.x - 10, center.y + 10);

g.drawString("X/" + center.x, 2 * center.x - 30, center.y - 50);

g.drawString("Y/" + center.y, center.x + 30, 30);

g.drawLine(a + center.x, center.y - b, center.x + c, center.y - d);

String m = "A(" + a + "," + b + ")";

g.drawString(m, (a + center.x) + 5, (center.y - b) + 5);

m = "B(" + c + "," + d + ")";

g.drawString(m, (c + center.x) + 5, (center.y - d) + 5);

}

--------------------------------------------DrawRound.java-----------------------------------------

package col.alex;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Graphics;

import javax.swing.JPanel;

public class DrawRound extends JPanel {

int a, b, c, d, i;

DrawRound() {

}

DrawRound(int a, int b, int c) {

this.a = a;

this.b = b;

this.c = c;

}

public void paintComponent(Graphics g) {

super.paintComponent(g);

setBackground(Color.gray);

Dimension panelSize = this.getSize();

System.out.println(panelSize.width + " " + panelSize.height);

Location center = new Location(panelSize.width / 2,

panelSize.height / 2);

int radius = (int) ((Math.min(panelSize.width, panelSize.height) / 2) * 0.9);

int[] x = new int[2 * radius + 1];

int[] y = new int[2 * radius + 1];

g.setColor(Color.black);

// 画坐标轴

g.drawLine(0, center.y, 2 * center.x, center.y);// x

g.drawLine(center.x, 0, center.x, 2 * center.y);// y

for (int i = -center.x / 10; i < center.x / 10; i++) {

g.drawLine(center.x + 10 * i, center.y, center.x + 10 * i,

center.y - 2);// x

g.drawLine(center.x, center.y + 10 * i, center.x - 2, center.y + 10

* i);// y

}

g.drawLine(2 * center.x, center.y, 2 * center.x - 10, center.y - 10);

g.drawLine(2 * center.x, center.y, 2 * center.x - 10, center.y + 10);

g.drawLine(center.x, 0, center.x - 10, 10);

g.drawLine(center.x, 0, center.x + 10, 10);

g.drawPolyline(x, y, 2 * radius + 1);

g.setColor(Color.red);

g.setFont(new Font("ScanSerif", Font.BOLD, 12));

g.drawString("单位长度为：10个单位", 60, 60);

g.drawString("O点坐标:（" + b + "," + c + ")", 60, 90);

g.drawString("半径为：" + a, 60, 120);

g.drawString("O", center.x - 10, center.y + 10);

g.drawString("X/" + center.x, 2 * center.x - 30, center.y - 50);

g.drawString("Y/" + center.y, center.x + 30, 30);

g.drawOval(center.x + b - a, center.y - c - a, 2 * a, 2 * a);

g.fillOval(center.x + b - 3 / 2, center.y - c - 3 / 2, 3, 3);

g.drawLine(center.x + b, center.y - c, center.x + b, center.y - c);

String m = "O(" + b + "," + c + ")";

g.drawString(m, (b + center.x) + 5, (center.y - c) + 5);

}

-------------------------------------------DrawSan.java-----------------------------------------

package col.alex;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Graphics;

import javax.swing.JPanel;

public class DrawSan extends JPanel {

int a, b, c, d, e, f;

DrawSan(int a, int b, int c, int d, int e, int f) {

this.a = a;

this.b = b;

this.c = c;

this.d = d;

this.e = e;

this.f = f;

}

public void paintComponent(Graphics g) {

super.paintComponent(g);

setBackground(Color.gray);

Dimension panelSize = this.getSize();

Location center = new Location(panelSize.width / 2,

panelSize.height / 2);

int radius = (int) ((Math.min(panelSize.width, panelSize.height) / 2) * 0.9);

int[] x = new int[2 * radius + 1];

int[] y = new int[2 * radius + 1];

g.setColor(Color.black);

// 画坐标轴

g.drawLine(0, center.y, 2 * center.x, center.y);// x

g.drawLine(center.x, 0, center.x, 2 * center.y);// y

for (int i = -center.x / 10; i < center.x / 10; i++) {

g.drawLine(center.x + 10 * i, center.y, center.x + 10 * i,

center.y - 2);// x

g.drawLine(center.x, center.y + 10 * i, center.x - 2, center.y + 10

* i);// y

}

g.drawLine(2 * center.x, center.y, 2 * center.x - 10, center.y - 10);

g.drawLine(2 * center.x, center.y, 2 * center.x - 10, center.y + 10);

g.drawLine(center.x, 0, center.x - 10, 10);

g.drawLine(center.x, 0, center.x + 10, 10);

g.drawPolyline(x, y, 2 * radius + 1);

g.setColor(Color.red);

g.setFont(new Font("ScanSerif", Font.BOLD, 12));

g.drawString("单位长度为：10个单位", 60, 60);

g.drawString("A点坐标:（" + a + "," + b + ")", 60, 90);

g.drawString("B点坐标:（" + c + "," + d + ")", 60, 120);

g.drawString("C点坐标:（" + e + "," + f + ")", 60, 150);

g.drawString("O", center.x - 10, center.y + 10);

g.drawString("X/" + center.x, 2 * center.x - 30, center.y - 50);

g.drawString("Y/" + center.y, center.x + 30, 30);

g.drawLine(a + center.x, center.y - b, center.x + c, center.y - d);

String m = "A(" + a + "," + b + ")";

g.drawString(m, (a + center.x), (center.y - b) + 10);

g.drawLine(c + center.x, center.y - d, center.x + e, center.y - f);

m = "B(" + c + "," + d + ")";

g.drawString(m, (c + center.x), (center.y - d) + 10);

g.drawLine(e + center.x, center.y - f, center.x + a, center.y - b);

m = "C(" + e + "," + f + ")";

g.drawString(m, (e + center.x), (center.y - f) + 10);

}

------------------------------------------JPanelSM.java-----------------------------------------

package col.alex;

import java.awt.*;

import javax.swing.*;

public class JPanelSM extends JPanel {

public void paintComponent(Graphics g) {

super.paintComponent(g);

setBackground(Color.gray);

Image img = Toolkit.getDefaultToolkit().getImage("1.gif");

Dimension panelSize = this.getSize();

Location center = new Location(panelSize.width / 2,

panelSize.height / 2);

int radius = (int) ((Math.min(panelSize.width, panelSize.height) / 2) * 0.9);

int[] x = new int[2 * radius + 1];

int[] y = new int[2 * radius + 1];

g.setColor(Color.red);

String a = "本画图程序为一个简易的画图程序，包括画直线，画三角形。";

g.drawString(a, 60, 60);

a = "①画三角形时候，在方框中输入三个顶点的坐标A,B,C 点击“画三角形”按钮即可在坐标轴中画出所需的三角形。";

g.drawString(a, 60, 120);

a = "②画直线的时候，在方框中输入起始点和终点的坐标 A,B 点击“画直线”按钮即可在坐标轴中画出所需的直线。 ";

g.drawString(a, 60, 180);

a = "③画圆的时候，在方框中输入半径和圆心所在的坐标点O ，点击”画圆“按钮即可在坐标轴中画出需要的圆。";

g.drawString(a, 60, 240);

a = "④所填的坐标必须在面板的范围内，必要的信息会在右上角显示！";

g.drawString(a, 60, 300);

g.setFont(new Font("宋体", Font.BOLD, 20));

a = "使用说明书";

g.drawString(a, center.x - 20, 20);

g.drawImage(img, 200, 200, 200, 200, this);

}

Swing画板 直线和三角形

Swing画板直线和三角形