首頁猿問怎么加上前面的文字？在線等

怎么加上前面的文字？在線等

Java

儚三姩 2017-03-09 17:22:58

package?six; import?java.awt.*; import?javax.swing.*; public?class?FirstSwingApplication?extends?JFrame{ private?JTextField?text1,text2,text3; private?JTextField?text_sum; private?JButton?btnresult,btnshow; public?FirstSwingApplication(){ s(); d(); setSize(300,200); setTitle("first?"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); pack(); } private?void?s(){ text1=new?JTextField(10); text2=new?JTextField(10); text1=new?JTextField(10); text_sum=new?JTextField(10); btnresult=new?JButton("計(jì)算"); btnshow=new?JButton("清楚"); } private?void?d(){ Container?a=getContentPane(); setLayout(new?GridLayout(4,1)); JPanel?pane1=new?JPanel(); pane1.add(text1); JPanel?pane2=new?JPanel(); pane2.add(text2); JPanel?pane3=new?JPanel(); pane3.add(text_sum); JPanel?pane4=new?JPanel(); pane4.add(btnresult); JPanel?pane5=new?JPanel(); pane5.add(btnshow); a.add(pane1); a.add(pane2); a.add(pane3); a.add(pane4); a.add(pane5); } public?static?void?main(String[]?args){ JFrame.setDefaultLookAndFeelDecorated(true); FirstSwingApplication?frame=new?FirstSwingApplication(); frame.setVisible(true); } }

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亞努人

TA貢獻(xiàn)58條經(jīng)驗(yàn) 獲得超75個(gè)贊

import java.awt.*;
import javax.swing.*;

public class FirstSwingApplication?extends?JFrame
{
??? private?JTextField?text1,text2,text3;
??? private?JTextField?text_sum;
??? private?JButton?btnresult,btnshow;
?????
????public?

?FirstSwingApplication(){
????????s();
????????d();
????????setSize(300,200);
????????setTitle("first?");
????????setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
????????pack();
????}?????????

?private?void?s(){
????????text1=new?JTextField(10);
????????text2=new?JTextField(10);
????????text1=new?JTextField(10);
????????text_sum=new?JTextField(10);
????????String str1 ="操作數(shù)1";
????????String str2 ="運(yùn)算數(shù)";
????????String str3 ="操作數(shù)2";
????????String str4 ="結(jié)果";
????????btnresult=new?JButton("計(jì)算");
?
????????btnshow=new?JButton("清楚");
?
????}?????????

?private?void?d(){
????????Container?a=getContentPane();
????????setLayout(new?GridLayout(4,1));
????????JPanel?pane1=new?JPanel();
???pane1.add(new Label(str1));
????????pane1.add(text1);
????????JPanel?pane2=new?JPanel();
??? ?pane2.add(new Label(str2));
????????pane2.add(text2);
????????JPanel?pane3=new?JPanel();
??pane3.add(new Label(str3));
????????pane3.add(text_sum);
????????JPanel?pane4=new?JPanel();
??pane4.add(new Label(str4));
????????pane4.add(btnresult);
????????JPanel?pane5=new?JPanel();
????????pane5.add(btnshow);
?????????
????????a.add(pane1);
????????a.add(pane2);
????????a.add(pane3);
????????a.add(pane4);
????????a.add(pane5);
????}?????????

?public?static?void?main(String[]?args){
????????JFrame.setDefaultLookAndFeelDecorated(true);
????????FirstSwingApplication?frame=new?FirstSwingApplication();
????????frame.setVisible(true);
?
????}
}

反對回復(fù) 2017-03-09

儚三姩
str1，str2等報(bào)錯(cuò)，就這條語句里【pane1.add(new Label(str2));】

回復(fù) 2017-03-09
亞努人
忘了，那是我直接加進(jìn)去的，大概意思就是那樣。報(bào)錯(cuò)是因?yàn)閟tr1初始化的時(shí)候和被調(diào)用的時(shí)候不是在一個(gè)方法里，你把上面的str=XXXX換到下面的d()方法里就可以了。

回復(fù) 2017-03-09
儚三姩
謝謝啊，大神

回復(fù) 2017-03-09