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public class Test
{
public static void main (String args[])
{
String a, b, c, d;
a = ''Hello1234'';
b = ''Hello'' + String.valueOf(1234);
c = ''Hello'' + ''1234'';
 
d = new String (new char[]{'H', 'e', 'l', 'l', 'o', '1', '2', '3', '4'});
 
System.out.print (a == b);
System.out.print ('' '');
System.out.print (a.equals(b));
System.out.print ('' '');
 
System.out.print (a == c);
System.out.print ('' '');
System.out.print (a.equals(c));
System.out.print ('' '');
 
System.out.print (a == d);
System.out.print ('' '');
System.out.print (a.equals(d));
System.out.print ('' '');
}
}

Main.java:6: error: empty character literal
a = ''Hello1234'';
    ^
Main.java:6: error: unclosed character literal
a = ''Hello1234'';
     ^
Main.java:6: error: empty character literal
a = ''Hello1234'';
               ^
Main.java:6: error: unclosed character literal
a = ''Hello1234'';
                ^
Main.java:7: error: empty character literal
b = ''Hello'' + String.valueOf(1234);
    ^
Main.java:7: error: unclosed character literal
b = ''Hello'' + String.valueOf(1234);
     ^
Main.java:7: error: empty character literal
b = ''Hello'' + String.valueOf(1234);
           ^
Main.java:7: error: unclosed character literal
b = ''Hello'' + String.valueOf(1234);
            ^
Main.java:8: error: empty character literal
c = ''Hello'' + ''1234'';
    ^
Main.java:8: error: unclosed character literal
c = ''Hello'' + ''1234'';
     ^
Main.java:8: error: empty character literal
c = ''Hello'' + ''1234'';
           ^
Main.java:8: error: unclosed character literal
c = ''Hello'' + ''1234'';
            ^
Main.java:8: error: empty character literal
c = ''Hello'' + ''1234'';
                ^
Main.java:8: error: unclosed character literal
c = ''Hello'' + ''1234'';
                 ^
Main.java:8: error: empty character literal
c = ''Hello'' + ''1234'';
                      ^
Main.java:8: error: unclosed character literal
c = ''Hello'' + ''1234'';
                       ^
Main.java:13: error: empty character literal
System.out.print ('' '');
                  ^
Main.java:13: error: ';' expected
System.out.print ('' '');
                   ^
Main.java:13: error: unclosed character literal
System.out.print ('' '');
                      ^
Main.java:15: error: empty character literal
System.out.print ('' '');
                  ^
Main.java:15: error: ';' expected
System.out.print ('' '');
                   ^
Main.java:15: error: unclosed character literal
System.out.print ('' '');
                      ^
Main.java:18: error: empty character literal
System.out.print ('' '');
                  ^
Main.java:18: error: ';' expected
System.out.print ('' '');
                   ^
Main.java:18: error: unclosed character literal
System.out.print ('' '');
                      ^
Main.java:20: error: empty character literal
System.out.print ('' '');
                  ^
Main.java:20: error: ';' expected
System.out.print ('' '');
                   ^
Main.java:20: error: unclosed character literal
System.out.print ('' '');
                      ^
Main.java:23: error: empty character literal
System.out.print ('' '');
                  ^
Main.java:23: error: ';' expected
System.out.print ('' '');
                   ^
Main.java:23: error: unclosed character literal
System.out.print ('' '');
                      ^
Main.java:25: error: empty character literal
System.out.print ('' '');
                  ^
Main.java:25: error: ';' expected
System.out.print ('' '');
                   ^
Main.java:25: error: unclosed character literal
System.out.print ('' '');
                      ^
34 errors

Standard output is empty