十进制转换为二进制数、八进制数和十六进制

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一、十进制转换为二进制数

public void test(int number) {

if (number==0) {
System.out.println('0');
return;
}
char [] ch=new char[]{'0','1'};
StringBuffer sb=new StringBuffer();
for (int i = 0; i <32; i++){
int temp=number&1;
sb.append(ch[temp]);
number=number>>>1;
if (number==0) {

break;
}
}
System.out.println(sb.reverse());
}

二、十进制转换为八进制数

public void test(int number){

if (number==0) {
System.out.println('0');
return;
}
char [] ch=new char[]{'0','1','2','3','4','5','6','7'};
StringBuffer sb=new StringBuffer();
for (;number!=0;) {
int temp=number&7;
sb.append(ch[temp]);
number=number>>>3;
}
System.out.println(sb.reverse());
}

三、十进制转换为十六进制

public void test(int number) {

if (number==0){
System.out.println('0');
return;
}
char [] ch=new char[]{'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
StringBuffer sb=new StringBuffer();
for (int i = 0; i < 8; i++) {
int temp=number&15;
sb.append(ch[temp]);
number=number>>>4;
if (number==0){

break;
}
}
System.out.println(sb.reverse());
}