一、按钮组件
1.1 提交按钮组件
package swing;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import javax.swing.*;
public class jbuttontest extends jframe {
/**
*
*/
private static final long serialversionuid = 1l;
public jbuttontest() {
url url = jbuttontest.class.getresource("imagebutton.jpg");
icon icon = new imageicon(url);
setlayout(new gridlayout(3, 2, 5, 5)); // 设置网格布局管理器
container c = getcontentpane(); // 创建容器
for (int i = 0; i < 5; i++) {
// 创建按钮，同时设置按钮文字与图标
jbutton j = new jbutton("button" + i, icon);
c.add(j); // 在容器中添加按钮
if (i % 2 == 0) {
j.setenabled(false); // 设置其中一些按钮不可用
}
}
jbutton jb = new jbutton(); // 实例化一个没有文字与图片的按钮
jb.setmaximumsize(new dimension(90, 30)); // 设置按钮与图片相同大小
jb.seticon(icon); // 为按钮设置图标
jb.sethideactiontext(true);
jb.settooltiptext("图片按钮"); // 设置按钮提示为文字
jb.setborderpainted(false); // 设置按钮边界不显示
jb.addactionlistener(new actionlistener() { // 为按钮添加监听事件
public void actionperformed(actionevent e) {
// 弹出确认对话框
joptionpane.showmessagedialog(null, "弹出对话框");
}
});
c.add(jb); // 将按钮添加到容器中
settitle("创建带文字与图片的按钮");
setsize(350, 150);
setvisible(true);
setdefaultcloseoperation(windowconstants.dispose_on_close);
}
public static void main(string args[]) {
new jbuttontest();
}
}
1.2 复选框组件
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class checkboxtest extends jframe {
/**
*
*/
private static final long serialversionuid = 1l;
private jpanel panel1 = new jpanel();
private jpanel panel2 = new jpanel();
private jtextarea jt = new jtextarea(3, 10);
private jcheckbox jc1 = new jcheckbox("1");
private jcheckbox jc2 = new jcheckbox("2");
private jcheckbox jc3 = new jcheckbox("3");
public checkboxtest() {
container c = getcontentpane();
c.setlayout(new borderlayout());
c.add(panel1, borderlayout.north);
final jscrollpane scrollpane = new jscrollpane(jt);
panel1.add(scrollpane);
c.add(panel2, borderlayout.south);
panel2.add(jc1);
jc1.addactionlistener(new actionlistener() {
public void actionperformed(actionevent e) {
if (jc1.isselected())
jt.append("复选框1被选中\n");
}
});
panel2.add(jc2);
jc2.addactionlistener(new actionlistener() {
public void actionperformed(actionevent e) {
if (jc2.isselected())
jt.append("复选框2被选中\n");
}
});
panel2.add(jc3);
jc3.addactionlistener(new actionlistener() {
public void actionperformed(actionevent e) {
if (jc3.isselected())
jt.append("复选框3被选中\n");
}
});
setsize(200, 160);
setvisible(true);
settitle("复选框的使用");
setdefaultcloseoperation(windowconstants.exit_on_close);
}
public static void main(string[] args) {
new checkboxtest();
}
}
二、列表组件
2.1 jcombobox类
import java.awt.*;
import javax.swing.*;
public class jcomboboxmodeltest extends jframe {
private static final long serialversionuid = 1l;
jcombobox<string> jc = new jcombobox<>(new mycombobox());
jlabel jl = new jlabel("请选择证件");
public jcomboboxmodeltest() {
setsize(new dimension(160, 180));
setvisible(true);
settitle("在窗口中设置下拉列表框");
setdefaultcloseoperation(windowconstants.dispose_on_close);
container cp = getcontentpane();
cp.setlayout(new flowlayout());
cp.add(jl);
cp.add(jc);
}
public static void main(string[] args) {
new jcomboboxmodeltest();
}
}
class mycombobox extends abstractlistmodel<string> implements comboboxmodel<string> {
/**
*
*/
private static final long serialversionuid = 1l;
string selecteditem = null;
string[] test = { "身份证", "军人证", "学生证", "工作证" };
public string getelementat(int index) {
return test[index];
}
public int getsize() {
return test.length;
}
public void setselecteditem(object item) {
selecteditem = (string) item;
}
public object getselecteditem() {
return selecteditem;
}
public int getindex() {
for (int i = 0; i < test.length; i++) {
if (test[i].equals(getselecteditem()))
return i;
}
return 0;
}
}
2.2 列表框组件
import java.awt.*;
import javax.swing.*;
public class jlisttest extends jframe {
/**
*
*/
private static final long serialversionuid = 1l;
public jlisttest() {
container cp = getcontentpane();
cp.setlayout(null);
jlist<string> jl = new jlist<>(new mylistmodel());
jscrollpane js = new jscrollpane(jl);
js.setbounds(10, 10, 100, 100);
cp.add(js);
settitle("在这个窗体中使用了列表框");
setsize(200, 150);
setvisible(true);
setdefaultcloseoperation(windowconstants.dispose_on_close);
}
public static void main(string args[]) {
new jlisttest();
}
}
class mylistmodel extends abstractlistmodel<string> {
/**
*
*/
private static final long serialversionuid = 1l;
private string[] contents = { "列表1", "列表2", "列表3", "列表4", "列表5", "列表6" };
public string getelementat(int x) {
if (x < contents.length)
return contents[x++];
else
return null;
}
public int getsize() {
return contents.length;
}
}
三、文本组件
3.1 文本框组件
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class jtextfieldtest extends jframe {
/**
*
*/
private static final long serialversionuid = 1l;
public jtextfieldtest() {
setsize(250, 100);
setdefaultcloseoperation(windowconstants.dispose_on_close);
container cp = getcontentpane();
getcontentpane().setlayout(new flowlayout());
final jtextfield jt = new jtextfield("aaa", 20);
final jbutton jb = new jbutton("清除");
cp.add(jt);
cp.add(jb);
jt.addactionlistener(new actionlistener() {
public void actionperformed(actionevent arg0) {
// todo 自动生成方法存根
jt.settext("触发事件");
}
});
jb.addactionlistener(new actionlistener() {
public void actionperformed(actionevent arg0) {
jt.settext("");
jt.requestfocus();
}
});
setvisible(true);
}
public static void main(string[] args) {
new jtextfieldtest();
}
}
3.2 密码框
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class jtextfieldtest extends jframe {
/**
*
*/
private static final long serialversionuid = 1l;
public jtextfieldtest() {
setsize(250, 100);
setdefaultcloseoperation(windowconstants.dispose_on_close);
container cp = getcontentpane();
getcontentpane().setlayout(new flowlayout());
// final jtextfield jt=new jtextfield("aaa",20);
jpasswordfield jp = new jpasswordfield("", 20);
jp.setechochar('*');
final jbutton jb = new jbutton("清除");
cp.add(jp);
cp.add(jb);
jp.addactionlistener(new actionlistener() {
public void actionperformed(actionevent arg0) {
// todo 自动生成方法存根
jp.settext("触发事件");
}
});
jb.addactionlistener(new actionlistener() {
public void actionperformed(actionevent arg0) {
jp.settext("");
jp.requestfocus();
}
});
setvisible(true);
}
public static void main(string[] args) {
new jtextfieldtest();
}
}
3.3 文本域组件
import java.awt.*;
import javax.swing.*;
public class jtextareatest extends jframe {
public jtextareatest() {
setsize(200, 100);
settitle("定义自动换行的文本域");
setdefaultcloseoperation(windowconstants.exit_on_close);
container cp = getcontentpane();
jtextarea jt = new jtextarea("文本域", 6, 6);
jt.setlinewrap(true);
cp.add(jt);
setvisible(true);
}
public static void main(string[] args) {
new jtextareatest();
}
}
四、常用时间监听器
4.1 动作事件监听器
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class simpleevent extends jframe {
/**
*
*/
private static final long serialversionuid = 1l;
private jbutton jb = new jbutton("我是按钮，点击我");
public simpleevent() {
setlayout(null);
setsize(200, 100);
setdefaultcloseoperation(windowconstants.dispose_on_close);
container cp = getcontentpane();
cp.add(jb);
jb.setbounds(10, 10, 100, 30);
jb.addactionlistener(new jbaction());
setvisible(true);
}
class jbaction implements actionlistener {
public void actionperformed(actionevent arg0) {
jb.settext("我被单击了");
}
}
public static void main(string[] args) {
new simpleevent();
}
}
4.2 焦点事件监听器
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class focuseventtest extends jframe {
/**
*
*/
private static final long serialversionuid = 1l;
public focuseventtest() {
setsize(250, 100);
setdefaultcloseoperation(windowconstants.exit_on_close);
container cp = getcontentpane();
getcontentpane().setlayout(new flowlayout());
final jlabel label = new jlabel();
getcontentpane().add(label);
jtextfield jt = new jtextfield("请单击其他文本框", 10);
jtextfield jt2 = new jtextfield("请单击我", 10);
cp.add(jt);
cp.add(jt2);
jt.addfocuslistener(new focuslistener() {
// 组件失去焦点时调用的方法
public void focuslost(focusevent arg0) {
joptionpane.showmessagedialog(null, "文本框失去焦点");
}
// 组件获取键盘焦点时调用的方法
public void focusgained(focusevent arg0) {
}
});
setvisible(true);
}
public static void main(string[] args) {
new focuseventtest();
}
}
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