package chapter8;import java.awt.Button;
import java.awt.Frame;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;public class demo2 {public static void main(String[] args) {Frame f1=new Frame("字符串统计");f1.setLayout(null);int f1width=800;int f1height=600;f1.setBounds(0, 0, f1width, f1height);TextField tf1=new TextField();tf1.setBounds(50,50,f1width-100,f1height/3);TextField tf2=new TextField();tf2.setBounds(50, f1height/3+80, f1width-100, f1height/3);Button bt1=new Button("统计");bt1.setBounds(f1width/2-50, f1height/3*2+80, 100,100);f1.add(tf1);f1.add(tf2);f1.add(bt1);f1.setVisible(true);MyWindowAdapter mwa=new MyWindowAdapter();f1.addWindowListener(mwa);MyActionListener mal=new MyActionListener(tf1,tf2);bt1.addActionListener(mal);}static class MyActionListener implements ActionListener{TextField tf1;TextField tf2;MyActionListener(TextField tf1,TextField tf2){this.tf1=tf1;this.tf2=tf2;}@Overridepublic void actionPerformed(ActionEvent e) {String str=tf1.getText();int da=0;int xiao=0;int shu=0;int han=0;int els=0;for(int i=0;i<str.length();i++) {char c=str.charAt(i);if(c>='A'&&c<='Z') {da=da+1;}else if(c>='a'&&c<='z'){xiao=xiao+1;}else if(c>='0'&&c<='9') {shu=shu+1;}else if(c>=0x4E00&&c<=0x9FA5) {han=han+1;}else {els=els+1;}}tf2.setText("大写:"+da+" 小写:"+xiao+" 数字:"+shu+" 汉字:"+han+" 其他"+els);}}static class MyWindowAdapter extends WindowAdapter{public void windowClosing(WindowEvent e) {System.exit(-1);}}
}