Java 十进制转二、八、十六进制的字符串
十进制转二进制
classDecToBin { publicstaticvoidmain(String[]args) { //System.out.println("HelloWorld!"); longdec=-9223372036854775807l; //-9223372036854775808这个数不行,不要试,嘿嘿 StringbinStr=""; longdecAbs=Math.abs(dec); while(decAbs>0) {binStr=(decAbs&1)+binStr; decAbs>>=1; } binStr=dec<0?"-"+binStr:dec==0?"0":binStr; System.out.println(binStr); } }
十进制转八进制
classDecToOct { publicstaticvoidmain(String[]args) { //System.out.println("HelloWorld!"); longdec=-0;//有-0吗? StringoctStr=""; longdecAbs=Math.abs(dec); while(decAbs>0) {octStr=(decAbs&7)+octStr;// decAbs>>=3; } octStr=dec<0?"-"+octStr:dec==0?"0":octStr; System.out.println(octStr); } }
十进制转十六进制
classDecToHex { publicstaticvoidmain(String[]args) { System.out.println("HelloWorld!"); longdec=-1;//计算器的负数不会弄-。- StringhexStr=""; longdecAbs=Math.abs(dec); while(decAbs>0) {longlastFour=decAbs&15; if(lastFour>9) hexStr=(char)('A'+lastFour-10)+hexStr; elsehexStr=lastFour+hexStr; decAbs>>=4; } hexStr=dec<0?"-"+hexStr:dec==0?"0":hexStr; System.out.println(hexStr); } }
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