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DoubleTest.java
public class DoubleTest {
public static void main(String args[]) {
Double D = Double.valueOf("45.3");
double d = D.doubleValue();
d = 2.0 * d;
System.out.println("°á°ú°ª : " + d);
}
}
C:\javaExample\Wrapper\Double>javac DoubleTest.java
C:\javaExample\Wrapper\Double>java DoubleTest
°á°ú°ª : 90.6
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