UC知道问下写了java程序compile的时候出现的问题...
来源：百度知道 编辑：UC知道 时间：2024/06/25 01:29:32
小弟初学...装了JRE,SE v1.4.2_12和Java 2 SDK, SE v1.4.2_12还有个J2SE Runtime Evironment 5.0 update 7. 用TextPad写了点东西:
import java.swing.JOptionPane;
public class TempConvertor {
public static void main (String[] args) {
final int base = 32;
final double conversionFactor = 9.0 / 5.0;
double fTemp;
String cTempInput;
int cTemp;
cTempInput = JOptionPane.showInputDialog ("Enter Celsius Temp: ");
cTemp = Integer.parseInt (cTempInput);
fTemp = cTemp * conversionFactor + base;
System.out.println ("Result: " + fTemp);
}
}
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还有另个:
import java.util.Scanner;
public class GasMileage {
public static void main (String[] args) {
int miles;
double gallons, mpg;
Scanner scan = new Scanner (Syst
import java.swing.JOptionPane;
public class TempConvertor {
public static void main (String[] args) {
final int base = 32;
final double conversionFactor = 9.0 / 5.0;
double fTemp;
String cTempInput;
int cTemp;
cTempInput = JOptionPane.showInputDialog ("Enter Celsius Temp: ");
cTemp = Integer.parseInt (cTempInput);
fTemp = cTemp * conversionFactor + base;
System.out.println ("Result: " + fTemp);
}
}
-----------------------------------------------------
还有另个:
import java.util.Scanner;
public class GasMileage {
public static void main (String[] args) {
int miles;
double gallons, mpg;
Scanner scan = new Scanner (Syst
import java.swing.JOptionPane
应该是:
import javax.swing.JOptionPane
(javax)
而Scanner类是JDK1.5以后才开始出现的,你的编译环境却是JDK1.4.2,所以编译系统找不到Scanner类
附:JDK是编译环境(也包括运行环境);而JRE只是运行环境,没有编译环境.
建议安装JDK1.5版本.