首頁猿問不知道哪里錯了.以下是代碼!~

不知道哪里錯了.以下是代碼!~

Java 數(shù)據(jù)結(jié)構(gòu)

回首憶惘然 2022-10-12 15:11:09

public class Time extends JFrame implements Runnable{int year = 0;int moth = 0;int day = 0;int hour = 0;int minute = 0;int second = 0;int width = Toolkit.getDefaultToolkit().getScreenSize().width;int height = Toolkit.getDefaultToolkit().getScreenSize().height;JLabel jl1 = new JLabel();Thread td = new Thread();public Time(){td.start();Calendar c=Calendar.getInstance();//獲得系統(tǒng)當(dāng)前日期year=c.get(Calendar.YEAR);moth = c.get(Calendar.MONTH)+1;//系統(tǒng)日期從0開始算起day=c.get(Calendar.DAY_OF_MONTH);hour = c.get(Calendar.HOUR);//小時minute =c.get(Calendar.MINUTE);//分second = c.get(Calendar.SECOND);//秒jl1 = new JLabel(year + "年" + moth + "月" + day + "日" + hour+ "時" + minute + "分" + second + "秒");jl1.setBounds(200, 100, 100, 50);this.add(jl1);this.setTitle("時間線程");this.setLocation((width - 500) / 2, (height - 500) / 2);this.setSize(500, 500);this.setVisible(true);}public static void main(String[] args) {new Time();}@Overridepublic void run() {while(true){try {td.sleep(1000);jl1 = new JLabel(year + "年" + moth + "月" + day + "日" + hour+ "時" + minute + "分" + second + "秒");} catch (InterruptedException e) {e.printStackTrace();}}}}

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2 回答

慕沐林林

TA貢獻2016條經(jīng)驗獲得超9個贊

import java.awt.Toolkit;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class Time extends JFrame implements Runnable {

int width = Toolkit.getDefaultToolkit().getScreenSize().width;
int height = Toolkit.getDefaultToolkit().getScreenSize().height;
JLabel jl1 = new JLabel();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 hh時mm分ss秒");

public Time() {
jl1 = new JLabel(sdf.format(new Date()));
jl1.setBounds(200, 100, 100, 50);
this.add(jl1);
this.setTitle("時間線程");
this.setLocation((width - 500) / 2, (height - 500) / 2);
this.setSize(500, 500);
this.setVisible(true);
}

public static void main(String[] args) {
Time t = new Time();
new Thread(t).start();
}

@Override
public void run() {
while (true) {
try {
Thread.sleep(1000);
jl1.setText(sdf.format(new Date()));
} catch (InterruptedException e) {
e.printStackTrace();
}
}

}
}

這樣比較簡潔吧。