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- public class Test1 {
- public static void main(String[]args){
- String a="";//代表空行 1 blank line
- String b=" ";//代表一格空白, 1 space
- String c=null;//print null
- System.out.println(a);
- System.out.println(b);
- System.out.println(c);
- }
- }
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