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public static ZerosOnesCounter countZerosAndOnes (int[] x) {
    int zeros; 
    int ones;  
 
    for (int i = 0; i<x.length; i++) {
        if (x[i] == 0)
        zeros++ ;
        else if (x[i] == 1)
        ones++ ;
    }
 
    ZerosOnesCounter result = new ZerosOnesCounter();
    result.setOnes(ones);
    result.setZeros(zeros);
 
    return result;
}

Main.java:1: class, interface, or enum expected
public static ZerosOnesCounter countZerosAndOnes (int[] x) {
              ^
Main.java:3: class, interface, or enum expected
    int ones;  
    ^
Main.java:5: class, interface, or enum expected
    for (int i = 0; i<x.length; i++) {
    ^
Main.java:5: class, interface, or enum expected
    for (int i = 0; i<x.length; i++) {
                    ^
Main.java:5: class, interface, or enum expected
    for (int i = 0; i<x.length; i++) {
                                ^
Main.java:8: class, interface, or enum expected
        else if (x[i] == 1)
        ^
Main.java:10: class, interface, or enum expected
    }
    ^
Main.java:13: class, interface, or enum expected
    result.setOnes(ones);
    ^
Main.java:14: class, interface, or enum expected
    result.setZeros(zeros);
    ^
Main.java:16: class, interface, or enum expected
    return result;
    ^
Main.java:17: class, interface, or enum expected
}
^
11 errors

Standard output is empty