java 如何在 JTextarea/JTextfield 中显示字符串

How To Display Strings in JTextarea/JTextfield

提问by JayD2208

Pretty basic question for you. I am new to Java, and so far have made some relatively simple Javascript programs. One particular favourite of mine is one I call The Perfect Insult, and I have decided to develop it properly, so I can say I've made a program.

对你来说非常基本的问题。我是Java新手，目前已经做了一些比较简单的Javascript程序。我最喜欢的是我称之为完美侮辱的一个，我决定正确地开发它，所以我可以说我已经制作了一个程序。

The core program isn't finished yet, but what I've done so far is enough. There will be some calculations to decide which response the computer chould give, but all the variables will remain the same. I just need to know how to print the code to a JTextArea or a JTextField rather that System.out. Any help would be much appreciated :).

核心程序还没有完成，但我目前所做的已经足够了。会有一些计算来决定计算机应该给出哪种响应，但所有变量都将保持不变。我只需要知道如何将代码打印到 JTextArea 或 JTextField 而不是System.out. 任何帮助将非常感激 ：）。

import java.awt.Color;
import java.awt.Font;
import java.util.Random;
import java.util.Scanner;
import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JTextField;
import javax.swing.JTextPane;
import javax.swing.JEditorPane;
import java.awt.Font;
import java.awt.Color;
import javax.swing.JTextArea;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;

public class tpiCore {

    public class rootInterface extends JFrame {

        private JPanel contentPane;
        private JTextField input;

        public void main(String[] args) {
            EventQueue.invokeLater(new Runnable() {
                public void run() {
                    try {
                        rootInterface frame = new rootInterface();
                        frame.setVisible(true);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            });
        }

        public rootInterface() {
            setBackground(Color.GREEN);
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            setBounds(100, 100, 450, 550);
            contentPane = new JPanel();
            contentPane.setForeground(Color.GREEN);
            contentPane.setBackground(Color.BLACK);
            contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
            setContentPane(contentPane);
            contentPane.setLayout(null);

            input = new JTextField();
            input.setFont(new Font("Lucida Console", Font.PLAIN, 11));
            input.setBackground(Color.DARK_GRAY);
            input.setBounds(10, 447, 414, 54);
            contentPane.add(input);
            input.setColumns(10);

            JEditorPane dtrpnThePerfectInsult = new JEditorPane();
            dtrpnThePerfectInsult.setForeground(Color.GREEN);
            dtrpnThePerfectInsult.setBackground(Color.BLACK);
            dtrpnThePerfectInsult.setFont(new Font("Lucida Console", Font.PLAIN, 20));
            dtrpnThePerfectInsult.setText("        The Perfect Insult");
            dtrpnThePerfectInsult.setBounds(10, 11, 414, 35);
            contentPane.add(dtrpnThePerfectInsult);

            JTextArea textArea = new JTextArea();
            textArea.setLineWrap(true);
            textArea.setBackground(Color.BLACK);
            textArea.setFont(new Font("Lucida Console", Font.PLAIN, 13));
            textArea.setForeground(Color.GREEN);
            textArea.setBounds(10, 57, 414, 383);
            contentPane.add(textArea);

            }
        }

        public static void core(String args[]) {
            String[] insults = new String[15];
            insults[0] = "insult 0";
            insults[1] = "insult 1";
            insults[2] = "insult 2";
            insults[3] = "insult 3";
            insults[4] = "insult 4";
            insults[5] = "insult 5";
            insults[6] = "insult 6";
            insults[7] = "insult 7";
            insults[8] = "insult 8";
            insults[9] = "insult 9";
            insults[10] = "insult 10";
            insults[11] = "insult 11";
            insults[12] = "insult 12";
            insults[13] = "insult 13";
            insults[14] = "insult 14";
            double count = 0;

            System.out.println("Come on then, hit me with your best shot!");

            while (count<10) {
                String insult1 = insults[(new Random()).nextInt(insults.length)];
                System.out.println(insult1);
                Scanner input = new Scanner(System.in);
                input.nextLine();
                String response = input.toString();
                count++;
            } 

            System.out.println("Okay, I give in. You win.");

            }

        }

回答by Kent

JTextArea.setText(string)
JTextArea.append(string)

java doc:

java文档：

http://docs.oracle.com/javase/6/docs/api/javax/swing/JTextArea.html

http://docs.oracle.com/javase/6/docs/api/javax/swing/JTextArea.html