Sandbox::https://github.com/for0231/java_demo/blob/master/UseTextField.java

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import java.awt.*;

import java.applet.*;

import java.applet.Applet;

public class UseTextField extends Applet

{

String str1 = new String();

int i1 = 0, i2 = 0;

TextField tf1, tf2, tf3, tf4;

public void init()

{

tf1 = new TextField();

tf2 = new TextField(20);

tf3 = new TextField("文本对象３");

tf4 = new TextField("文本对象４");

add(tf1);

add(tf2);

add(tf3);

add(tf4);

}

public void start()

{

tf1.setText("文本对象１");

tf2.setText("文本对象２");

str1 = tf3.getText();

i1 = tf3.getColumns();

i2 = tf4.getColumns();

tf4.setEditable(false);

repaint();

}

public void paint(Graphics g)

{

g.drawString("第三个对象的文本内容为:　" + str1, 20, 140);

g.drawString("第三个对象的列数为: " + i1, 20, 160);

g.drawString("第四个对象的列数为: " + i2, 20, 180);

}