1、java.util.Scanner类的对象可以读入输入数据:
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49package sjq.demo; import java.util.Scanner; public class NiZhuan { public static void main(String args[]){ Scanner scanner = new Scanner(System.in); String result = ""; System.out.println("input a byte: "); byte byte_var = scanner.nextByte(); result += ("Result: n" + "Byte: " + byte_var); System.out.println("input a short: "); short short_var = scanner.nextShort(); result += ("nShort: " + short_var); System.out.println("input a integer: "); int int_var = scanner.nextInt(); result += ("nInteger: " + int_var); System.out.println("input a long: "); long long_var = scanner.nextLong(); result += ("nLong: " + long_var); System.out.println("input a float: "); float float_var = scanner.nextFloat(); result += ("nFloat: " + float_var); System.out.println("input a double: "); double double_var = scanner.nextDouble(); result += ("nDouble: " + double_var); System.out.println(result); } } # 运行结果: input a byte: 1 input a short: 2 input a integer: 3 input a long: 4 input a float: 5.5 input a double: 6.6 Result: Byte: 1 Short: 2 Integer: 3 Long: 4 Float: 5.5 Double: 6.6
2、javax.swing.JOptionPane的方法以会话框的形式读入数据
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15import javax.swing.JOptionPane; public class AddtionTutor { public static void main(String[] args){ String answerString = JOptionPane.showInputDialog("世界上有几个太阳?"); String replyString; int ans = Integer.parseInt(answerString); if(ans == 1){ replyString = "Correct!"; }else{ replyString = "Wrong!!!n"; replyString += "正确的为: " + 1; } JOptionPane.showMessageDialog(null, replyString); } }
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