第15讲-JavaGUI编程入门.pptx

第十五讲JavaGUI编程入门;一、JavaGUI窗口概述;简朴旳JavaGUI示例;java.awt和javax.swing;Color和Font;Color和Font（续）;二、利用JFrame类创建窗口界面;JFrame类;JFrame类（续）;JFrame类（续）;JFrame类（续）;JFrame类（续）;JFrame类（续）;JFrame类（续）;JFrame类（续）;JFrame类（续）;importjavax.swing.*;

importjava.awt.*;

publicclassSimpleFrameextendsJFrame{

SimpleFrame(){

super(asimplejavawindow);

this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);

this.setBounds(300,200,300,100);

Containerc=this.getContentPane();

c.setLayout(newFlowLayout());

c.add(newJButton(Imajavabutton));

c.add(newJLabel(Imajavalabel));

this.setVisible(true);

}

publicstaticvoidmain(String[]args){

newSimpleFrame();

}

};三、最常用组件旳创建和使用;JLabel(标签);JLabel(标签);importjavax.swing.*;

importjava.awt.*;

classJLabelTestextendsJFrame{

JLabelTest(){

super(JLabelTest);

this.setDefaultCloseOperation(EXIT_ON_CLOSE);

JLabeltext=newJLabel(桃花开了);

text.setFont(newFont(楷体,Font.BOLD,48));

JLabelpic=newJLabel(newImageIcon(flower.jpg));

Containercc=this.getContentPane();

cc.setLayout(newFlowLayout());

cc.add(text);cc.add(pic);

this.setBounds(200,200,500,280);

this.setVisible(true);

}

publicstaticvoidmain(String[]args){

newJLabelTest();

}

};JTextField和JPasswordField;JTextField和JPasswordField;JTextArea（多行文本框）;JTextArea（多行文本框）;JScrollPane（滚动面板）;JScrollPane（滚动面板）;importjava.awt.*;

importjavax.swing.*;

importjava.io.*;

classJTextAreaTestextendsJFrame{

JTextAreaTest(){

super(JTextAreaJScrollPaneTest);

this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);

Containerc=this.getContentPane();

c.setLayout(newFlowLayout());

JTextAreat=newJTextArea(10,35);

t.setText(getFileText());

t.setFont(newFont(,Font.PLAIN,16));

t.setLineWrap(true);

c.add(newJLabel(MyJavaReader));

c.add(newJScrollPane(t));

this.setBounds(300,300,500,300);

this.setVisible(true);

}; StringgetFileText(){

byte[]b=null;