代码如下，我希望文本字段中的任何数据都T1被T2减去并在T3我们按下按钮后进入......
import java.applet.Applet;
import java.awt.Button;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class abc extends Applet implements ActionListener {
TextField T1, T2, T3, T4, T5;
Button B1;
String ST1, ST2, ST3;
double a;
public void paint(Graphics g) {
setLayout(null);
setBackground(Color.pink);
g.drawRect(0, 0, 600, 500);
g.drawLine(0, 50, 600, 50);
g.drawLine(0, 80, 600, 80);
g.drawLine(150, 50, 150, 80);
g.drawLine(300, 50, 300, 80);
g.drawLine(0, 110, 600, 110);
g.drawLine(120, 80, 120, 150);
g.drawLine(240, 80, 240, 150);
g.drawLine(360, 80, 360, 150);
g.drawLine(480, 80, 480, 150);
g.drawLine(0, 150, 600, 150);
g.drawLine(230, 150, 230, 360);
g.drawLine(300, 150, 300, 170);
g.drawLine(370, 150, 370, 170);
g.drawLine(460, 150, 460, 390);
g.drawLine(230, 170, 460, 170);
g.drawLine(0, 390, 600, 390);
g.drawLine(0, 360, 460, 360);
g.drawLine(345, 200, 345, 390);
g.drawLine(0, 200, 345, 200);
g.drawLine(0, 420, 600, 420);
g.drawLine(0, 220, 230, 220);
g.drawLine(0, 240, 230, 240);
g.drawLine(0, 260, 230, 260);
g.drawLine(0, 280, 230, 280);
g.drawLine(0, 300, 230, 300);
g.drawLine(0, 320, 230, 320);
g.drawLine(0, 340, 230, 340);
g.drawLine(140, 220, 140, 360);
Label L1 = new Label("A COMPANY PVT.LTD.");
L1.setBounds(150, 5, 440, 30);
Font myFont = new Font("TimesRoman", Font.BOLD, 18);
L1.setFont(myFont);
Label L2 = new Label("Ph. :01222");
L2.setBounds(200, 30, 250, 20);
Label L3 = new Label("Date //___");
L3.setBounds(470, 30, 120, 20);
Label L4 = new Label("Vehicle No.");
Label L5 = new Label("Colliery");
Label L6 = new Label("Unloaded at:");
L4.setBounds(5, 55, 120, 10);
L5.setBounds(155, 55, 130, 15);
L6.setBounds(315, 55, 120, 10);
this.add(L1);
this.add(L2);
this.add(L3);
this.add(L4);
this.add(L5);
this.add(L6);
Label L7 = new Label("Desp.Wt.in MT");
L7.setBounds(10, 84, 100, 25);
this.add(L7);
Label L8 = new Label("Recd.Wt.in MT");
L8.setBounds(135, 84, 100, 25);
this.add(L8);
Label L9 = new Label("Shortage in MT");
L9.setBounds(255, 84, 100, 25);
this.add(L9);
Label L10 = new Label("Freight Rate PMT");
L10.setBounds(375, 84, 100, 25);
this.add(L10);
Label L11 = new Label("Advance Rs.");
L11.setBounds(500, 84, 95, 25);
this.add(L11);
Font myFont1 = new Font("TimesRoman", Font.BOLD, 10);
Label L12 = new Label("Weight X");
L12.setBounds(240, 152, 55, 15);
this.add(L12);
L12.setFont(myFont1);
Label L13 = new Label("Freight =");
L13.setBounds(310, 152, 55, 15);
this.add(L13);
L13.setFont(myFont1);
Label L14 = new Label("Amount");
L14.setBounds(390, 152, 55, 15);
this.add(L14);
L14.setFont(myFont1);
Font myFont2 = new Font("ArialBlack", Font.BOLD, 10);
Label S1 = new Label("Particulars");
S1.setBounds(15, 221, 30, 18);
S1.setFont(myFont2);
this.add(S1);
Label S2 = new Label("Shortage");
S2.setBounds(5, 241, 30, 18);
S2.setFont(myFont2);
this.add(S2);
Label S3 = new Label("Advance");
S3.setBounds(5, 261, 30, 18);
S3.setFont(myFont2);
this.add(S3);
Label S4 = new Label("Commission");
S4.setBounds(5, 281, 30, 18);
S4.setFont(myFont2);
this.add(S4);
Label S5 = new Label("Munsiana");
S5.setBounds(5, 301, 30, 18);
S5.setFont(myFont2);
this.add(S5);
Label S6 = new Label("Other Deduction");
S6.setBounds(5, 321, 30, 18);
S6.setFont(myFont2);
this.add(S6);
Label S7 = new Label("Total");
S7.setBounds(5, 341, 30, 18);
S7.setFont(myFont2);
this.add(S7);
Label R1 = new Label("Amount");
R1.setBounds(150, 221, 40, 18);
R1.setFont(myFont2);
this.add(R1);
TextField R2 = new TextField();
R2.setBounds(145, 241, 80, 18);
R2.setFont(myFont2);
this.add(R2);
TextField R3 = new TextField();
R3.setBounds(145, 261, 80, 18);
R3.setFont(myFont2);
this.add(R3);
TextField R4 = new TextField();
R4.setBounds(145, 281, 80, 18);
R4.setFont(myFont2);
this.add(R4);
TextField R5 = new TextField();
R5.setBounds(145, 301, 80, 18);
R5.setFont(myFont2);
this.add(R5);
TextField R6 = new TextField();
R6.setBounds(145, 321, 80, 18);
R6.setFont(myFont2);
this.add(R6);
TextField R7 = new TextField();
R7.setBounds(145, 341, 80, 18);
R7.setFont(myFont2);
this.add(R7);
Label L15 = new Label("Total Freight Payable Rs.");
L15.setBounds(190, 366, 150, 19);
this.add(L15);
Label L16 = new Label("Rupees....................................................................................");
L16.setBounds(30, 395, 200, 19);
this.add(L16);
Label L17 = new Label("Paid Date.................................................");
L17.setBounds(10, 425, 200, 19);
this.add(L17);
L17 = new Label("Recieved By Name....................................");
L17.setBounds(10, 450, 200, 19);
this.add(L17);
Label L18 = new Label("Mobile No........................................");
L18.setBounds(10, 475, 200, 19);
this.add(L18);
Label L19 = new Label("Signature");
L19.setBounds(250, 475, 150, 19);
this.add(L19);
Label L20 = new Label("For:A Co.(P)Ltd");
L20.setBounds(440, 475, 155, 19);
this.add(L20);
T1 = new TextField();
T1.setBounds(5, 118, 110, 28);
this.add(T1);
T2 = new TextField();
T2.setBounds(125, 118, 110, 28);
this.add(T2);
T3 = new TextField();
T3.setBounds(245, 118, 110, 28);
this.add(T3);
T4 = new TextField();
T4.setBounds(365, 118, 110, 28);
this.add(T4);
T5 = new TextField();
T5.setBounds(485, 118, 110, 28);
this.add(T5);
B1 = new Button("Submit");
B1.setBounds(200, 520, 100, 23);
B1.addActionListener(this);
this.add(B1);
T1.setText("40");
T2.setText("20");
ST1 = T1.getText();
ST2 = T2.getText();
a = Double.parseDouble(ST1) - Double.parseDouble(ST2);
ST3 = "" + a;
}
public void actionPerformed(ActionEvent ev) {
Object obj = ev.getSource();
if (obj == B1) {
System.out.println("wjnqjqw");
} else {
T3.setText(ST3);
System.out.println("assassas");
}
}
}// <applet code="abc.java" width=600 height=550></applet>