View Compilation Error

871076_0_0_31426\Main.java:1: 需要 "class" 或 "interface"
packgage hdu1881
^
871076_0_0_31426\Main.java:3: 需要 "class" 或 "interface"
    import java.io.IOException;
    ^
871076_0_0_31426\Main.java:4: 需要 "class" 或 "interface"
    import java.io.InputStreamReader;
    ^
871076_0_0_31426\Main.java:5: 需要 "class" 或 "interface"
    import java.io.OutputStreamWriter;
    ^
871076_0_0_31426\Main.java:6: 需要 "class" 或 "interface"
    import java.io.PrintWriter;
    ^
871076_0_0_31426\Main.java:7: 需要 "class" 或 "interface"
    import java.io.StreamTokenizer;
    ^
871076_0_0_31426\Main.java:8: 需要 "class" 或 "interface"
    import java.util.Arrays;
    ^
871076_0_0_31426\Main.java:9: 需要 "class" 或 "interface"
    import java.util.Comparator;
    ^
8 错误