3.1作业
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例3.1
class DataDemo01{
public static void main(string[] args){
int num = 99999999999999999999999d
}
}
例3.2
class DataDemo02{
public static void main(String[] args){
int max = Integer.MAX_VALUE;
System.out.println("整型的最大值:" + max);
System.out.println("整型最大值 + 1:" + (max + 1));
System.out.println("整型最大值 + 2:" + (max + 2));
}
}
例3.3
public class DataDemo03{
public static void main(String[] args){
int max = Integer.MAX_VALUE;
System.out.println("整型的最大值:" + max);
System.out.println("整型最大值 + 1:" + (max + 1));
System.out.println("整型最大值 + 2:" + (max + 2L));
System.out.println("整型最大值 + 1:" + ((long)max +2));
}
}
例3.4
public class DataDemo04{
public static void main(String[] args){
char ch1 = ‘a‘;
char ch2 = 97;
System.out.println("ch1 = " + ch1);
System.out.println("ch2 = " + ch2);
}
}
例3.5
public class DataDemo05{
public static void main(String[] args){
char ch1 = ‘\"‘;
char ch2 = ‘\\‘;
System.out.println("ch1 = "+ch1);
System.out.println("ch1 = "+ch2);
System.out.println("\"Hello World\"");
}
}
例3.6
public class DataDemo06{
public static void main(String[] args){
float num = 3.0f;
System.out.println("两个小数相乘:"+num*num);
}
}
例3.7
public class DataDemo07{
public static void main(String[] args){
boolean flag = true;
System.out.println("flag = "+flag);
}
}
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